diff --git a/src/js/button.js b/src/js/button.js
index 010f9de64..b5e5f5dc1 100644
--- a/src/js/button.js
+++ b/src/js/button.js
@@ -4,7 +4,6 @@
 import ClickableComponent from './clickable-component.js';
 import Component from './component';
 import log from './utils/log.js';
-import {assign} from './utils/obj';
 import keycode from 'keycode';
 import {createEl} from './utils/dom.js';
 
@@ -34,12 +33,12 @@ class Button extends ClickableComponent {
   createEl(tag, props = {}, attributes = {}) {
     tag = 'button';
 
-    props = assign({
+    props = Object.assign({
       className: this.buildCSSClass()
     }, props);
 
     // Add attributes for button element
-    attributes = assign({
+    attributes = Object.assign({
 
       // Necessary since the default button type is "submit"
       type: 'button'
diff --git a/src/js/clickable-component.js b/src/js/clickable-component.js
index ba7410cae..f02895be0 100644
--- a/src/js/clickable-component.js
+++ b/src/js/clickable-component.js
@@ -4,7 +4,6 @@
 import Component from './component';
 import * as Dom from './utils/dom.js';
 import log from './utils/log.js';
-import {assign} from './utils/obj';
 import keycode from 'keycode';
 
 /**
@@ -68,7 +67,7 @@ class ClickableComponent extends Component {
    *         The element that gets created.
    */
   createEl(tag = 'div', props = {}, attributes = {}) {
-    props = assign({
+    props = Object.assign({
       className: this.buildCSSClass(),
       tabIndex: 0
     }, props);
@@ -78,7 +77,7 @@ class ClickableComponent extends Component {
     }
 
     // Add ARIA attributes for clickable element which is not a native HTML button
-    attributes = assign({
+    attributes = Object.assign({
       role: 'button'
     }, attributes);
 
diff --git a/src/js/control-bar/progress-control/load-progress-bar.js b/src/js/control-bar/progress-control/load-progress-bar.js
index fb48890f7..31d108eb3 100644
--- a/src/js/control-bar/progress-control/load-progress-bar.js
+++ b/src/js/control-bar/progress-control/load-progress-bar.js
@@ -3,7 +3,7 @@
  */
 import Component from '../../component.js';
 import * as Dom from '../../utils/dom.js';
-import clamp from '../../utils/clamp';
+import {clamp} from '../../utils/num';
 import document from 'global/document';
 
 // get the percent width of a time compared to the total end
diff --git a/src/js/control-bar/progress-control/progress-control.js b/src/js/control-bar/progress-control/progress-control.js
index 2d4e6926d..8a7879443 100644
--- a/src/js/control-bar/progress-control/progress-control.js
+++ b/src/js/control-bar/progress-control/progress-control.js
@@ -3,7 +3,7 @@
  */
 import Component from '../../component.js';
 import * as Dom from '../../utils/dom.js';
-import clamp from '../../utils/clamp.js';
+import {clamp} from '../../utils/num';
 import {bind, throttle, UPDATE_REFRESH_INTERVAL} from '../../utils/fn.js';
 import {silencePromise} from '../../utils/promise';
 
diff --git a/src/js/control-bar/progress-control/seek-bar.js b/src/js/control-bar/progress-control/seek-bar.js
index 5f806c7d8..499462333 100644
--- a/src/js/control-bar/progress-control/seek-bar.js
+++ b/src/js/control-bar/progress-control/seek-bar.js
@@ -6,7 +6,7 @@ import Component from '../../component.js';
 import {IS_IOS, IS_ANDROID} from '../../utils/browser.js';
 import * as Dom from '../../utils/dom.js';
 import * as Fn from '../../utils/fn.js';
-import formatTime from '../../utils/format-time.js';
+import {formatTime} from '../../utils/time';
 import {silencePromise} from '../../utils/promise';
 import keycode from 'keycode';
 import document from 'global/document';
diff --git a/src/js/control-bar/progress-control/time-tooltip.js b/src/js/control-bar/progress-control/time-tooltip.js
index ede9bb4d7..4eebd3340 100644
--- a/src/js/control-bar/progress-control/time-tooltip.js
+++ b/src/js/control-bar/progress-control/time-tooltip.js
@@ -3,7 +3,7 @@
  */
 import Component from '../../component';
 import * as Dom from '../../utils/dom.js';
-import formatTime from '../../utils/format-time.js';
+import { formatTime } from '../../utils/time';
 import * as Fn from '../../utils/fn.js';
 
 /**
diff --git a/src/js/control-bar/time-controls/time-display.js b/src/js/control-bar/time-controls/time-display.js
index 99999ee62..88dd2eb40 100644
--- a/src/js/control-bar/time-controls/time-display.js
+++ b/src/js/control-bar/time-controls/time-display.js
@@ -4,7 +4,7 @@
 import document from 'global/document';
 import Component from '../../component.js';
 import * as Dom from '../../utils/dom.js';
-import formatTime from '../../utils/format-time.js';
+import { formatTime } from '../../utils/time';
 import log from '../../utils/log.js';
 
 /**
diff --git a/src/js/control-bar/volume-control/volume-bar.js b/src/js/control-bar/volume-control/volume-bar.js
index c7148837e..ac6f86080 100644
--- a/src/js/control-bar/volume-control/volume-bar.js
+++ b/src/js/control-bar/volume-control/volume-bar.js
@@ -4,7 +4,7 @@
 import Slider from '../../slider/slider.js';
 import Component from '../../component.js';
 import * as Dom from '../../utils/dom.js';
-import clamp from '../../utils/clamp.js';
+import {clamp} from '../../utils/num';
 import {IS_IOS, IS_ANDROID} from '../../utils/browser.js';
 
 // Required children
diff --git a/src/js/media-error.js b/src/js/media-error.js
index b313c5065..57fa92e07 100644
--- a/src/js/media-error.js
+++ b/src/js/media-error.js
@@ -1,7 +1,7 @@
 /**
  * @file media-error.js
  */
-import {assign, isObject} from './utils/obj';
+import {isObject} from './utils/obj';
 
 /**
  * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.
@@ -41,7 +41,7 @@ function MediaError(value) {
       this.code = value.code;
     }
 
-    assign(this, value);
+    Object.assign(this, value);
   }
 
   if (!this.message) {
diff --git a/src/js/menu/menu-item.js b/src/js/menu/menu-item.js
index f8b660f2b..7a95e19a5 100644
--- a/src/js/menu/menu-item.js
+++ b/src/js/menu/menu-item.js
@@ -3,7 +3,6 @@
  */
 import ClickableComponent from '../clickable-component.js';
 import Component from '../component.js';
-import {assign} from '../utils/obj';
 import {MenuKeys} from './menu-keys.js';
 import keycode from 'keycode';
 import {createEl} from '../utils/dom.js';
@@ -64,7 +63,7 @@ class MenuItem extends ClickableComponent {
     // The control is textual, not just an icon
     this.nonIconControl = true;
 
-    const el = super.createEl('li', assign({
+    const el = super.createEl('li', Object.assign({
       className: 'vjs-menu-item',
       tabIndex: -1
     }, props), attrs);
diff --git a/src/js/mixins/evented.js b/src/js/mixins/evented.js
index c03273ceb..4bdd475ed 100644
--- a/src/js/mixins/evented.js
+++ b/src/js/mixins/evented.js
@@ -6,7 +6,6 @@ import window from 'global/window';
 import * as Dom from '../utils/dom';
 import * as Events from '../utils/events';
 import * as Fn from '../utils/fn';
-import * as Obj from '../utils/obj';
 import EventTarget from '../event-target';
 import DomData from '../utils/dom-data';
 import log from '../utils/log';
@@ -489,7 +488,7 @@ function evented(target, options = {}) {
     target.eventBusEl_ = Dom.createEl('span', {className: 'vjs-event-bus'});
   }
 
-  Obj.assign(target, EventedMixin);
+  Object.assign(target, EventedMixin);
 
   if (target.eventedCallbacks) {
     target.eventedCallbacks.forEach((callback) => {
diff --git a/src/js/mixins/stateful.js b/src/js/mixins/stateful.js
index 0e24bdeaf..0fd72d089 100644
--- a/src/js/mixins/stateful.js
+++ b/src/js/mixins/stateful.js
@@ -103,11 +103,11 @@ const StatefulMixin = {
  *          Returns the `target`.
  */
 function stateful(target, defaultState) {
-  Obj.assign(target, StatefulMixin);
+  Object.assign(target, StatefulMixin);
 
   // This happens after the mixing-in because we need to replace the `state`
   // added in that step.
-  target.state = Obj.assign({}, target.state, defaultState);
+  target.state = Object.assign({}, target.state, defaultState);
 
   // Auto-bind the `handleStateChanged` method of the target object if it exists.
   if (typeof target.handleStateChanged === 'function' && isEvented(target)) {
diff --git a/src/js/player.js b/src/js/player.js
index b2074d86a..5d272ef16 100644
--- a/src/js/player.js
+++ b/src/js/player.js
@@ -17,7 +17,7 @@ import * as browser from './utils/browser.js';
 import {IE_VERSION, IS_CHROME, IS_WINDOWS} from './utils/browser.js';
 import log, { createLogger } from './utils/log.js';
 import {toTitleCase, titleCaseEquals} from './utils/str.js';
-import { createTimeRange } from './utils/time-ranges.js';
+import { createTimeRanges } from './utils/time';
 import { bufferedPercent } from './utils/buffer.js';
 import * as stylesheet from './utils/stylesheet.js';
 import FullscreenApi from './fullscreen-api.js';
@@ -32,7 +32,7 @@ import {ALL as TRACK_TYPES} from './tracks/track-types';
 import filterSource from './utils/filter-source';
 import {getMimetype, findMimetype} from './utils/mimetypes';
 import {hooks} from './utils/hooks';
-import {assign, merge, isObject} from './utils/obj';
+import {merge, isObject} from './utils/obj';
 import keycode from 'keycode';
 
 // The following imports are used only to ensure that the corresponding modules
@@ -310,7 +310,7 @@ class Player extends Component {
     // which overrides globally set options.
     // This latter part coincides with the load order
     // (tag must exist before Player)
-    options = assign(Player.getTagSettings(tag), options);
+    options = Object.assign(Player.getTagSettings(tag), options);
 
     // Delay the initialization of children because we need to set up
     // player properties first, and can't use `this` before `super()`
@@ -1185,9 +1185,9 @@ class Player extends Component {
       techOptions[props.getterName] = this[props.privateName];
     });
 
-    assign(techOptions, this.options_[titleTechName]);
-    assign(techOptions, this.options_[camelTechName]);
-    assign(techOptions, this.options_[techName.toLowerCase()]);
+    Object.assign(techOptions, this.options_[titleTechName]);
+    Object.assign(techOptions, this.options_[camelTechName]);
+    Object.assign(techOptions, this.options_[techName.toLowerCase()]);
 
     if (this.tag) {
       techOptions.tag = this.tag;
@@ -2487,7 +2487,7 @@ class Player extends Component {
    *         been played.
    */
   played() {
-    return this.techGet_('played') || createTimeRange(0, 0);
+    return this.techGet_('played') || createTimeRanges(0, 0);
   }
 
   /**
@@ -2650,7 +2650,7 @@ class Player extends Component {
     let buffered = this.techGet_('buffered');
 
     if (!buffered || !buffered.length) {
-      buffered = createTimeRange(0, 0);
+      buffered = createTimeRanges(0, 0);
     }
 
     return buffered;
@@ -4796,18 +4796,18 @@ class Player extends Component {
 
     // Used as a getter.
     if (breakpoints === undefined) {
-      return assign(this.breakpoints_);
+      return Object.assign(this.breakpoints_);
     }
 
     this.breakpoint_ = '';
-    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, breakpoints);
+    this.breakpoints_ = Object.assign({}, DEFAULT_BREAKPOINTS, breakpoints);
 
     // When breakpoint definitions change, we need to update the currently
     // selected breakpoint.
     this.updateCurrentBreakpoint_();
 
     // Clone the breakpoints before returning.
-    return assign(this.breakpoints_);
+    return Object.assign(this.breakpoints_);
   }
 
   /**
@@ -5037,10 +5037,10 @@ class Player extends Component {
       if (err) {
         log.error(err);
       }
-      assign(tagOptions, data);
+      Object.assign(tagOptions, data);
     }
 
-    assign(baseOptions, tagOptions);
+    Object.assign(baseOptions, tagOptions);
 
     // Get tag children settings
     if (tag.hasChildNodes()) {
diff --git a/src/js/slider/slider.js b/src/js/slider/slider.js
index 0fe41ee89..d1f0d028a 100644
--- a/src/js/slider/slider.js
+++ b/src/js/slider/slider.js
@@ -3,9 +3,8 @@
  */
 import Component from '../component.js';
 import * as Dom from '../utils/dom.js';
-import {assign} from '../utils/obj';
 import {IS_CHROME} from '../utils/browser.js';
-import clamp from '../utils/clamp.js';
+import {clamp} from '../utils/num';
 import keycode from 'keycode';
 
 /**
@@ -126,11 +125,11 @@ class Slider extends Component {
   createEl(type, props = {}, attributes = {}) {
     // Add the slider element class to all sub classes
     props.className = props.className + ' vjs-slider';
-    props = assign({
+    props = Object.assign({
       tabIndex: 0
     }, props);
 
-    attributes = assign({
+    attributes = Object.assign({
       'role': 'slider',
       'aria-valuenow': 0,
       'aria-valuemin': 0,
diff --git a/src/js/tech/html5.js b/src/js/tech/html5.js
index fd7f060af..6ec0101bd 100644
--- a/src/js/tech/html5.js
+++ b/src/js/tech/html5.js
@@ -8,7 +8,7 @@ import log from '../utils/log.js';
 import * as browser from '../utils/browser.js';
 import document from 'global/document';
 import window from 'global/window';
-import {assign, merge} from '../utils/obj';
+import {merge} from '../utils/obj';
 import {toTitleCase} from '../utils/str.js';
 import {NORMAL as TRACK_TYPES, REMOTE} from '../tracks/track-types';
 import setupSourceset from './setup-sourceset';
@@ -392,7 +392,7 @@ class Html5 extends Tech {
 
         Dom.setAttributes(
           el,
-          assign(attributes, {
+          Object.assign(attributes, {
             id: this.options_.techId,
             class: 'vjs-tech'
           })
diff --git a/src/js/tech/middleware.js b/src/js/tech/middleware.js
index b978bf29e..bb7f3ad94 100644
--- a/src/js/tech/middleware.js
+++ b/src/js/tech/middleware.js
@@ -2,7 +2,6 @@
  * @file middleware.js
  * @module middleware
  */
-import { assign } from '../utils/obj.js';
 import {toTitleCase} from '../utils/str.js';
 
 const middlewares = {};
@@ -301,7 +300,7 @@ function setSourceHelper(src = {}, middleware = [], next, player, acc = [], last
       return setSourceHelper(src, mwrest, next, player, acc, lastRun);
     }
 
-    mw.setSource(assign({}, src), function(err, _src) {
+    mw.setSource(Object.assign({}, src), function(err, _src) {
 
       // something happened, try the next middleware on the current level
       // make sure to use the old src
diff --git a/src/js/tech/tech.js b/src/js/tech/tech.js
index c0e546bcc..29a8f9705 100644
--- a/src/js/tech/tech.js
+++ b/src/js/tech/tech.js
@@ -5,7 +5,7 @@
 import Component from '../component';
 import * as Fn from '../utils/fn.js';
 import log from '../utils/log.js';
-import { createTimeRange } from '../utils/time-ranges.js';
+import { createTimeRanges } from '../utils/time';
 import { bufferedPercent } from '../utils/buffer.js';
 import MediaError from '../media-error.js';
 import window from 'global/window';
@@ -279,7 +279,7 @@ class Tech extends Component {
    *         The time range object that was created.
    */
   buffered() {
-    return createTimeRange(0, 0);
+    return createTimeRanges(0, 0);
   }
 
   /**
@@ -486,9 +486,9 @@ class Tech extends Component {
    */
   played() {
     if (this.hasStarted_) {
-      return createTimeRange(0, 0);
+      return createTimeRanges(0, 0);
     }
-    return createTimeRange();
+    return createTimeRanges();
   }
 
   /**
diff --git a/src/js/utils/buffer.js b/src/js/utils/buffer.js
index 83a94b3f1..3ee45cf6a 100644
--- a/src/js/utils/buffer.js
+++ b/src/js/utils/buffer.js
@@ -2,7 +2,7 @@
  * @file buffer.js
  * @module buffer
  */
-import { createTimeRange } from './time-ranges.js';
+import { createTimeRanges } from './time';
 
 /**
  * Compute the percentage of the media that has been buffered.
@@ -26,7 +26,7 @@ export function bufferedPercent(buffered, duration) {
   }
 
   if (!buffered || !buffered.length) {
-    buffered = createTimeRange(0, 0);
+    buffered = createTimeRanges(0, 0);
   }
 
   for (let i = 0; i < buffered.length; i++) {
diff --git a/src/js/utils/format-time.js b/src/js/utils/format-time.js
deleted file mode 100644
index 1ae1425b1..000000000
--- a/src/js/utils/format-time.js
+++ /dev/null
@@ -1,94 +0,0 @@
-/**
- * @file format-time.js
- * @module format-time
- */
-
-/**
- * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in
- * seconds) will force a number of leading zeros to cover the length of the
- * guide.
- *
- * @private
- * @param  {number} seconds
- *         Number of seconds to be turned into a string
- *
- * @param  {number} guide
- *         Number (in seconds) to model the string after
- *
- * @return {string}
- *         Time formatted as H:MM:SS or M:SS
- */
-const defaultImplementation = function(seconds, guide) {
-  seconds = seconds < 0 ? 0 : seconds;
-  let s = Math.floor(seconds % 60);
-  let m = Math.floor(seconds / 60 % 60);
-  let h = Math.floor(seconds / 3600);
-  const gm = Math.floor(guide / 60 % 60);
-  const gh = Math.floor(guide / 3600);
-
-  // handle invalid times
-  if (isNaN(seconds) || seconds === Infinity) {
-    // '-' is false for all relational operators (e.g. <, >=) so this setting
-    // will add the minimum number of fields specified by the guide
-    h = m = s = '-';
-  }
-
-  // Check if we need to show hours
-  h = (h > 0 || gh > 0) ? h + ':' : '';
-
-  // If hours are showing, we may need to add a leading zero.
-  // Always show at least one digit of minutes.
-  m = (((h || gm >= 10) && m < 10) ? '0' + m : m) + ':';
-
-  // Check if leading zero is need for seconds
-  s = (s < 10) ? '0' + s : s;
-
-  return h + m + s;
-};
-
-// Internal pointer to the current implementation.
-let implementation = defaultImplementation;
-
-/**
- * Replaces the default formatTime implementation with a custom implementation.
- *
- * @param {Function} customImplementation
- *        A function which will be used in place of the default formatTime
- *        implementation. Will receive the current time in seconds and the
- *        guide (in seconds) as arguments.
- */
-export function setFormatTime(customImplementation) {
-  implementation = customImplementation;
-}
-
-/**
- * Resets formatTime to the default implementation.
- */
-export function resetFormatTime() {
-  implementation = defaultImplementation;
-}
-
-/**
- * Delegates to either the default time formatting function or a custom
- * function supplied via `setFormatTime`.
- *
- * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a
- * guide (in seconds) will force a number of leading zeros to cover the
- * length of the guide.
- *
- * @static
- * @example  formatTime(125, 600) === "02:05"
- * @param    {number} seconds
- *           Number of seconds to be turned into a string
- *
- * @param    {number} guide
- *           Number (in seconds) to model the string after
- *
- * @return   {string}
- *           Time formatted as H:MM:SS or M:SS
- */
-function formatTime(seconds, guide = seconds) {
-  return implementation(seconds, guide);
-}
-
-export default formatTime;
diff --git a/src/js/utils/clamp.js b/src/js/utils/num.js
similarity index 84%
rename from src/js/utils/clamp.js
rename to src/js/utils/num.js
index f4b1e52ee..c4557ca32 100644
--- a/src/js/utils/clamp.js
+++ b/src/js/utils/num.js
@@ -12,10 +12,8 @@
  * @return {number}
  *         the clamped number
  */
-const clamp = function(number, min, max) {
+export const clamp = function(number, min, max) {
   number = Number(number);
 
   return Math.min(max, Math.max(min, isNaN(number) ? min : number));
 };
-
-export default clamp;
diff --git a/src/js/utils/obj.js b/src/js/utils/obj.js
index 4ea4a26cb..af53d9315 100644
--- a/src/js/utils/obj.js
+++ b/src/js/utils/obj.js
@@ -80,31 +80,6 @@ export function reduce(object, fn, initial = 0) {
   return keys(object).reduce((accum, key) => fn(accum, object[key], key), initial);
 }
 
-/**
- * Object.assign-style object shallow merge/extend.
- *
- * @param  {Object} target
- * @param  {Object} ...sources
- * @return {Object}
- */
-export function assign(target, ...sources) {
-  if (Object.assign) {
-    return Object.assign(target, ...sources);
-  }
-
-  sources.forEach(source => {
-    if (!source) {
-      return;
-    }
-
-    each(source, (value, key) => {
-      target[key] = value;
-    });
-  });
-
-  return target;
-}
-
 /**
  * Returns whether a value is an object of any kind - including DOM nodes,
  * arrays, regular expressions, etc. Not functions, though.
diff --git a/src/js/utils/time-ranges.js b/src/js/utils/time.js
similarity index 56%
rename from src/js/utils/time-ranges.js
rename to src/js/utils/time.js
index 0627eae45..386292702 100644
--- a/src/js/utils/time-ranges.js
+++ b/src/js/utils/time.js
@@ -1,12 +1,100 @@
 /**
- * @file time-ranges.js
- * @module time-ranges
+ * @file time.js
+ * @module time
  */
 import window from 'global/window';
 
+/**
+ * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in
+ * seconds) will force a number of leading zeros to cover the length of the
+ * guide.
+ *
+ * @private
+ * @param  {number} seconds
+ *         Number of seconds to be turned into a string
+ *
+ * @param  {number} guide
+ *         Number (in seconds) to model the string after
+ *
+ * @return {string}
+ *         Time formatted as H:MM:SS or M:SS
+ */
+const defaultImplementation = function(seconds, guide) {
+  seconds = seconds < 0 ? 0 : seconds;
+  let s = Math.floor(seconds % 60);
+  let m = Math.floor(seconds / 60 % 60);
+  let h = Math.floor(seconds / 3600);
+  const gm = Math.floor(guide / 60 % 60);
+  const gh = Math.floor(guide / 3600);
+
+  // handle invalid times
+  if (isNaN(seconds) || seconds === Infinity) {
+    // '-' is false for all relational operators (e.g. <, >=) so this setting
+    // will add the minimum number of fields specified by the guide
+    h = m = s = '-';
+  }
+
+  // Check if we need to show hours
+  h = (h > 0 || gh > 0) ? h + ':' : '';
+
+  // If hours are showing, we may need to add a leading zero.
+  // Always show at least one digit of minutes.
+  m = (((h || gm >= 10) && m < 10) ? '0' + m : m) + ':';
+
+  // Check if leading zero is need for seconds
+  s = (s < 10) ? '0' + s : s;
+
+  return h + m + s;
+};
+
+// Internal pointer to the current implementation.
+let implementation = defaultImplementation;
+
+/**
+ * Replaces the default formatTime implementation with a custom implementation.
+ *
+ * @param {Function} customImplementation
+ *        A function which will be used in place of the default formatTime
+ *        implementation. Will receive the current time in seconds and the
+ *        guide (in seconds) as arguments.
+ */
+export function setFormatTime(customImplementation) {
+  implementation = customImplementation;
+}
+
+/**
+ * Resets formatTime to the default implementation.
+ */
+export function resetFormatTime() {
+  implementation = defaultImplementation;
+}
+
+/**
+ * Delegates to either the default time formatting function or a custom
+ * function supplied via `setFormatTime`.
+ *
+ * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a
+ * guide (in seconds) will force a number of leading zeros to cover the
+ * length of the guide.
+ *
+ * @static
+ * @example  formatTime(125, 600) === "02:05"
+ * @param    {number} seconds
+ *           Number of seconds to be turned into a string
+ *
+ * @param    {number} guide
+ *           Number (in seconds) to model the string after
+ *
+ * @return   {string}
+ *           Time formatted as H:MM:SS or M:SS
+ */
+export function formatTime(seconds, guide = seconds) {
+  return implementation(seconds, guide);
+}
+
 /**
  * Returns the time for the specified index at the start or end
- * of a TimeRange object.
+ * of a TimeRanges object.
  *
  * @typedef    {Function} TimeRangeIndex
  *
@@ -23,15 +111,15 @@ import window from 'global/window';
 /**
  * An object that contains ranges of time.
  *
- * @typedef  {Object} TimeRange
+ * @typedef  {Object} TimeRanges
  *
  * @property {number} length
  *           The number of time ranges represented by this object.
  *
- * @property {module:time-ranges~TimeRangeIndex} start
+ * @property {module:time~TimeRangeIndex} start
  *           Returns the time offset at which a specified time range begins.
  *
- * @property {module:time-ranges~TimeRangeIndex} end
+ * @property {module:time~TimeRangeIndex} end
  *           Returns the time offset at which a specified time range ends.
  *
  * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges
@@ -60,7 +148,7 @@ function rangeCheck(fnName, index, maxIndex) {
 
 /**
  * Get the time for the specified index at the start or end
- * of a TimeRange object.
+ * of a TimeRanges object.
  *
  * @private
  * @param      {string} fnName
@@ -123,7 +211,7 @@ function createTimeRangesObj(ranges) {
 }
 
 /**
- * Create a `TimeRange` object which mimics an
+ * Create a `TimeRanges` object which mimics an
  * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.
  *
  * @param {number|Array[]} start
@@ -142,5 +230,3 @@ export function createTimeRanges(start, end) {
   }
   return createTimeRangesObj([[start, end]]);
 }
-
-export { createTimeRanges as createTimeRange };
diff --git a/src/js/utils/url.js b/src/js/utils/url.js
index 7d8ef047a..3eecd959a 100644
--- a/src/js/utils/url.js
+++ b/src/js/utils/url.js
@@ -82,7 +82,7 @@ export const parseUrl = function(url) {
 };
 
 /**
- * Get absolute version of relative URL. Used to tell Flash the correct URL.
+ * Get absolute version of relative URL.
  *
  * @function
  * @param    {string} url
diff --git a/src/js/video.js b/src/js/video.js
index 06a2cd446..0faa79074 100644
--- a/src/js/video.js
+++ b/src/js/video.js
@@ -2,11 +2,10 @@
  * @file video.js
  * @module videojs
  */
-import {version} from '../../package.json';
+import { version } from '../../package.json';
 import window from 'global/window';
 
 // Include core functions and classes
-import extend from './extend';
 import * as setup from './setup';
 import * as stylesheet from './utils/stylesheet';
 import Component from './component';
@@ -18,16 +17,17 @@ import AudioTrack from './tracks/audio-track';
 import VideoTrack from './tracks/video-track';
 
 // Include utilities
-import { createTimeRange } from './utils/time-ranges';
-import formatTime, { setFormatTime, resetFormatTime } from './utils/format-time';
 import log, { createLogger } from './utils/log';
-import deprecate from './utils/deprecate';
+
+// The browser and DOM utilities are the only ones that are exported wholesale
+// on the videojs function. All others are exported selectively/explicitly.
 import * as browser from './utils/browser';
-import clamp from './utils/clamp';
-import computedStyle from './utils/computed-style';
 import * as dom from './utils/dom';
-import * as events from './utils/events';
-import * as fn from './utils/fn';
+
+import computedStyle from './utils/computed-style';
+import deprecate from './utils/deprecate';
+import { any, off, on, one, trigger } from './utils/events';
+import { debounce, throttle } from './utils/fn';
 
 import {
   hooks_,
@@ -37,10 +37,12 @@ import {
   removeHook
 } from './utils/hooks';
 
-import * as obj from './utils/obj';
-import * as promise from './utils/promise';
-import * as str from './utils/str';
-import * as url from './utils/url';
+import { clamp } from './utils/num';
+import { each, reduce, isObject, isPlain, merge } from './utils/obj';
+import { isPromise, silencePromise } from './utils/promise';
+import { toLowerCase, toTitleCase, titleCaseEquals } from './utils/str';
+import { createTimeRanges, formatTime, resetFormatTime, setFormatTime } from './utils/time';
+import { parseUrl, getAbsoluteURL, getFileExtension, isCrossOrigin } from './utils/url';
 
 import xhr from '@videojs/xhr';
 
@@ -106,9 +108,9 @@ const normalizeId = (id) => id.indexOf('#') === 0 ? id.slice(1) : id;
  * @borrows EventTarget as EventTarget
  * @borrows module:extend~extend as extend
  * @borrows module:fn.bind as bind
- * @borrows module:format-time.formatTime as formatTime
- * @borrows module:format-time.resetFormatTime as resetFormatTime
- * @borrows module:format-time.setFormatTime as setFormatTime
+ * @borrows module:time.formatTime as formatTime
+ * @borrows module:time.resetFormatTime as resetFormatTime
+ * @borrows module:time.setFormatTime as setFormatTime
  * @borrows module:middleware.use as use
  * @borrows Player.players as players
  * @borrows Plugin.registerPlugin as registerPlugin
@@ -119,8 +121,8 @@ const normalizeId = (id) => id.indexOf('#') === 0 ? id.slice(1) : id;
  * @borrows Tech.getTech as getTech
  * @borrows Tech.registerTech as registerTech
  * @borrows TextTrack as TextTrack
- * @borrows module:time-ranges.createTimeRanges as createTimeRange
- * @borrows module:time-ranges.createTimeRanges as createTimeRanges
+ * @borrows module:time.createTimeRanges as createTimeRanges
+ * @borrows module:time.createTimeRanges as createTimeRanges
  * @borrows module:url.isCrossOrigin as isCrossOrigin
  * @borrows module:url.parseUrl as parseUrl
  * @borrows VideoTrack as VideoTrack
@@ -171,14 +173,14 @@ function videojs(id, options, ready) {
   options = options || {};
 
   hooks('beforesetup').forEach((hookFunction) => {
-    const opts = hookFunction(el, obj.merge(options));
+    const opts = hookFunction(el, merge(options));
 
-    if (!obj.isObject(opts) || Array.isArray(opts)) {
+    if (!isObject(opts) || Array.isArray(opts)) {
       log.error('please return an object in beforesetup hooks');
       return;
     }
 
-    options = obj.merge(options, opts);
+    options = merge(options, opts);
   });
 
   // We get the current "Player" component here in case an integration has
@@ -374,7 +376,7 @@ Object.defineProperty(videojs.middleware, 'TERMINATOR', {
 videojs.addLanguage = function(code, data) {
   code = ('' + code).toLowerCase();
 
-  videojs.options.languages = obj.merge(
+  videojs.options.languages = merge(
     videojs.options.languages,
     {[code]: data}
   );
@@ -419,16 +421,14 @@ videojs.dom = dom;
  * @type {Object}
  * @see  {@link module:fn|fn}
  */
-videojs.fn = fn;
+videojs.fn = { debounce, throttle };
 
 /**
  * An object containing number-related functions.
  *
  * @type {Object}
  */
-videojs.num = {
-  clamp
-};
+videojs.num = { clamp };
 
 /**
  * A reference to the {@link module:obj|object utility module} as an object.
@@ -436,7 +436,7 @@ videojs.num = {
  * @type {Object}
  * @see  {@link module:obj|obj}
  */
-videojs.obj = obj;
+videojs.obj = { each, reduce, isObject, isPlain, merge };
 
 /**
  * A reference to the {@link module:promise|promise utility module} as an object.
@@ -444,7 +444,7 @@ videojs.obj = obj;
  * @type {Object}
  * @see  {@link module:promise|promise}
  */
-videojs.promise = promise;
+videojs.promise = { isPromise, silencePromise };
 
 /**
  * A reference to the {@link module:str|string utility module} as an object.
@@ -452,19 +452,14 @@ videojs.promise = promise;
  * @type {Object}
  * @see  {@link module:str|str}
  */
-videojs.str = str;
+videojs.str = { toLowerCase, toTitleCase, titleCaseEquals };
 
 /**
  * An object containing time-related functions.
  *
  * @type {Object}
  */
-videojs.time = {
-  createTimeRange,
-  format: formatTime,
-  setFormat: setFormatTime,
-  resetFormat: resetFormatTime
-};
+videojs.time = { createTimeRanges, formatTime, resetFormatTime, setFormatTime };
 
 /**
  * A reference to the {@link module:url|URL utility module} as an object.
@@ -472,7 +467,7 @@ videojs.time = {
  * @type {Object}
  * @see  {@link module:url|url}
  */
-videojs.url = url;
+videojs.url = { parseUrl, getAbsoluteURL, getFileExtension, isCrossOrigin };
 
 /**
  * Namespace for general utility functions.
@@ -485,25 +480,23 @@ videojs.utils = {
 };
 
 // Deprecated global namespace functions
-videojs.extend = deprecate('videojs.extend is deprecated as of 8.0. Please use native ES6 classes instead.', extend);
-videojs.mergeOptions = deprecate('videojs.mergeOptions is deprecated as of 8.0. Please use videojs.obj.merge instead.', obj.merge);
-videojs.bind = deprecate('videojs.bind is deprecated as of 8.0. Please use native Function.prototype.bind instead.', fn.bind);
-videojs.createTimeRange = deprecate('videojs.createTimeRange is deprecated as of 8.0. Please use videojs.time.createTimeRange instead.', createTimeRange);
-videojs.createTimeRanges = deprecate('videojs.createTimeRanges is deprecated as of 8.0. Please use videojs.time.createTimeRange instead.', createTimeRange);
+videojs.createTimeRanges = deprecate('videojs.createTimeRanges is deprecated as of 8.0. Please use videojs.time.createTimeRanges instead.', createTimeRanges);
+videojs.createTimeRanges = deprecate('videojs.createTimeRanges is deprecated as of 8.0. Please use videojs.time.createTimeRanges instead.', createTimeRanges);
 videojs.formatTime = deprecate('videojs.formatTime is deprecated as of 8.0. Please use videojs.time.format instead.', formatTime);
 videojs.setFormatTime = deprecate('videojs.setFormatTime is deprecated as of 8.0. Please use videojs.time.setFormat instead.', setFormatTime);
 videojs.resetFormatTime = deprecate('videojs.resetFormatTime is deprecated as of 8.0. Please use videojs.time.resetFormat instead.', resetFormatTime);
 videojs.computedStyle = deprecate('videojs.computedStyle is deprecated as of 8.0. Please use videojs.utils.computedStyle instead.', computedStyle);
 videojs.defineLazyProperty = deprecate('videojs.defineLazyProperty is deprecated as of 8.0. Please use videojs.utils.defineLazyProperty instead.', defineLazyProperty);
-videojs.isPromise = deprecate('videojs.isPromise is deprecated as of 8.0. Please use videojs.promise.isPromise instead.', promise.isPromise);
-videojs.silencePromise = deprecate('videojs.silencePromise is deprecated as of 8.0. Please use videojs.promise.silencePromise instead.', promise.silencePromise);
-videojs.parseUrl = deprecate('videojs.parseUrl is deprecated as of 8.0. Please use videojs.url.parseUrl instead.', url.parseUrl);
-videojs.isCrossOrigin = deprecate('videojs.isCrossOrigin is deprecated as of 8.0. Please use videojs.url.isCrossOrigin instead.', url.isCrossOrigin);
+videojs.isPromise = deprecate('videojs.isPromise is deprecated as of 8.0. Please use videojs.promise.isPromise instead.', isPromise);
+videojs.silencePromise = deprecate('videojs.silencePromise is deprecated as of 8.0. Please use videojs.promise.silencePromise instead.', silencePromise);
+videojs.parseUrl = deprecate('videojs.parseUrl is deprecated as of 8.0. Please use videojs.url.parseUrl instead.', parseUrl);
+videojs.isCrossOrigin = deprecate('videojs.isCrossOrigin is deprecated as of 8.0. Please use videojs.url.isCrossOrigin instead.', isCrossOrigin);
 
-videojs.on = events.on;
-videojs.one = events.one;
-videojs.off = events.off;
-videojs.trigger = events.trigger;
+videojs.any = any;
+videojs.off = off;
+videojs.on = on;
+videojs.one = one;
+videojs.trigger = trigger;
 
 videojs.EventTarget = EventTarget;
 videojs.TextTrack = TextTrack;
diff --git a/test/unit/live-tracker.test.js b/test/unit/live-tracker.test.js
index de88e4600..cf7416db8 100644
--- a/test/unit/live-tracker.test.js
+++ b/test/unit/live-tracker.test.js
@@ -1,6 +1,6 @@
 /* eslint-env qunit */
 import TestHelpers from './test-helpers.js';
-import {createTimeRanges} from '../../src/js/utils/time-ranges.js';
+import {createTimeRanges} from '../../src/js/utils/time';
 import sinon from 'sinon';
 
 QUnit.module('LiveTracker', () => {
diff --git a/test/unit/player-breakpoints.test.js b/test/unit/player-breakpoints.test.js
index c6531de94..06b311ed7 100644
--- a/test/unit/player-breakpoints.test.js
+++ b/test/unit/player-breakpoints.test.js
@@ -1,9 +1,8 @@
 /* eslint-env qunit */
 import sinon from 'sinon';
 import TestHelpers from './test-helpers';
-import {assign} from '../../src/js/utils/obj';
 
-const getExpectedBreakpoints = (o) => assign({}, {
+const getExpectedBreakpoints = (o) => Object.assign({}, {
   tiny: 210,
   xsmall: 320,
   small: 425,
diff --git a/test/unit/seek-to-live.test.js b/test/unit/seek-to-live.test.js
index e4721f55b..3346fb001 100644
--- a/test/unit/seek-to-live.test.js
+++ b/test/unit/seek-to-live.test.js
@@ -2,7 +2,7 @@
 import TestHelpers from './test-helpers.js';
 import sinon from 'sinon';
 import computedStyle from '../../src/js/utils/computed-style.js';
-import { createTimeRange } from '../../src/js/utils/time-ranges.js';
+import { createTimeRanges } from '../../src/js/utils/time';
 
 QUnit.module('SeekToLive', {
   beforeEach() {
@@ -17,7 +17,7 @@ QUnit.module('SeekToLive', {
       this.player.paused = () => false;
       this.player.hasStarted = () => true;
       this.player.options_.liveui = true;
-      this.player.seekable = () => createTimeRange(0, 45);
+      this.player.seekable = () => createTimeRanges(0, 45);
       this.player.currentTime = () => this.player.liveTracker.liveCurrentTime();
       this.player.duration(Infinity);
     };
@@ -35,7 +35,7 @@ QUnit.test('liveui enabled, can switch between at and behind live edge ', functi
   assert.ok(this.seekToLive.hasClass('vjs-at-live-edge'), 'has at live edge class');
 
   this.player.currentTime = () => 0;
-  this.player.seekable = () => createTimeRange(0, 38);
+  this.player.seekable = () => createTimeRanges(0, 38);
   this.clock.tick(30);
 
   assert.notOk(this.seekToLive.hasClass('vjs-at-live-edge'), 'does not have at live edge class');
@@ -84,7 +84,7 @@ QUnit.test('liveui disabled live window is never shown', function(assert) {
 
   // liveui false
   this.player.options_.liveui = false;
-  this.player.seekable = () => createTimeRange(0, 19);
+  this.player.seekable = () => createTimeRanges(0, 19);
   this.player.duration(Infinity);
 
   assert.equal(this.getComputedDisplay(), 'none', 'is hidden');
diff --git a/test/unit/tech/tech-faker.js b/test/unit/tech/tech-faker.js
index a9523e2c4..2267f0e23 100644
--- a/test/unit/tech/tech-faker.js
+++ b/test/unit/tech/tech-faker.js
@@ -1,7 +1,7 @@
 // Fake a media playback tech controller so that player tests
 // can run without HTML5 which PhantomJS does not support.
 import Tech from '../../../src/js/tech/tech.js';
-import {createTimeRanges} from '../../../src/js/utils/time-ranges.js';
+import {createTimeRanges} from '../../../src/js/utils/time';
 /**
  * @class
  */
diff --git a/test/unit/tech/tech.test.js b/test/unit/tech/tech.test.js
index 07bc9bffe..0b923d2a8 100644
--- a/test/unit/tech/tech.test.js
+++ b/test/unit/tech/tech.test.js
@@ -2,7 +2,7 @@
 import Tech from '../../../src/js/tech/tech.js';
 import Html5 from '../../../src/js/tech/html5.js';
 import Button from '../../../src/js/button.js';
-import { createTimeRange } from '../../../src/js/utils/time-ranges.js';
+import { createTimeRanges } from '../../../src/js/utils/time';
 import extend from '../../../src/js/extend.js';
 import MediaError from '../../../src/js/media-error.js';
 import AudioTrack from '../../../src/js/tracks/audio-track';
@@ -573,7 +573,7 @@ QUnit.test('delegates deferrables to the source handler', function(assert) {
   const handler = {
     seekable() {
       seekableCount++;
-      return createTimeRange(0, 0);
+      return createTimeRanges(0, 0);
     },
     seeking() {
       seekingCount++;
@@ -624,7 +624,7 @@ QUnit.test('delegates only deferred deferrables to the source handler', function
   const handler = {
     seekable() {
       seekableCount++;
-      return createTimeRange(0, 0);
+      return createTimeRanges(0, 0);
     },
     duration() {
       durationCount++;
diff --git a/test/unit/utils/format-time.test.js b/test/unit/utils/format-time.test.js
deleted file mode 100644
index ec64aa567..000000000
--- a/test/unit/utils/format-time.test.js
+++ /dev/null
@@ -1,50 +0,0 @@
-/* eslint-env qunit */
-import formatTime, { setFormatTime, resetFormatTime } from '../../../src/js/utils/format-time.js';
-
-QUnit.module('format-time standard implementation', {
-  afterEach: resetFormatTime()
-});
-
-QUnit.test('should format time as a string', function(assert) {
-  assert.ok(formatTime(1) === '0:01');
-  assert.ok(formatTime(10) === '0:10');
-  assert.ok(formatTime(60) === '1:00');
-  assert.ok(formatTime(600) === '10:00');
-  assert.ok(formatTime(3600) === '1:00:00');
-  assert.ok(formatTime(36000) === '10:00:00');
-  assert.ok(formatTime(360000) === '100:00:00');
-
-  // Using guide should provide extra leading zeros
-  assert.ok(formatTime(1, 1) === '0:01');
-  assert.ok(formatTime(1, 10) === '0:01');
-  assert.ok(formatTime(1, 60) === '0:01');
-  assert.ok(formatTime(1, 600) === '00:01');
-  assert.ok(formatTime(1, 3600) === '0:00:01');
-  // Don't do extra leading zeros for hours
-  assert.ok(formatTime(1, 36000) === '0:00:01');
-  assert.ok(formatTime(1, 360000) === '0:00:01');
-
-  // Do not display negative time
-  assert.ok(formatTime(-1) === '0:00');
-  assert.ok(formatTime(-1, 3600) === '0:00:00');
-});
-
-QUnit.test('should format invalid times as dashes', function(assert) {
-  assert.equal(formatTime(Infinity, 90), '-:-');
-  assert.equal(formatTime(NaN), '-:-');
-  assert.equal(formatTime(10, Infinity), '0:00:10');
-  assert.equal(formatTime(90, NaN), '1:30');
-});
-
-QUnit.test('setFormatTime', function(assert) {
-  setFormatTime((seconds, guide) => `custom:${seconds}:${guide}`);
-  assert.equal(formatTime(1, 2), 'custom:1:2', 'it should replace the default formatTime implementation');
-});
-
-QUnit.test('resetFormatTime ', function(assert) {
-  setFormatTime((seconds, guide) => `custom:${seconds}:${guide}`);
-  assert.equal(formatTime(1, 2), 'custom:1:2');
-  resetFormatTime();
-  assert.equal(formatTime(1), '0:01', 'it should reset formatTime to the default implementation');
-});
-
diff --git a/test/unit/utils/obj.test.js b/test/unit/utils/obj.test.js
index 0138b1b0f..523b7ed50 100644
--- a/test/unit/utils/obj.test.js
+++ b/test/unit/utils/obj.test.js
@@ -106,119 +106,6 @@ QUnit.test('isPlain', function(assert) {
   });
 });
 
-QUnit.module('utils/obj.assign', function() {
-  const assignTests = ['mocked'];
-
-  // we only run "normal" tests where Object.assign is used when
-  // Object.assign is supported
-  if (Object.assign) {
-    assignTests.push('unmocked');
-  }
-
-  assignTests.forEach(function(k) {
-    QUnit.module(`with ${k} Object.assign`, {
-      before() {
-        if (k === 'mocked') {
-          this.oldObjectAssign = Object.assign;
-          Object.assign = null;
-        }
-      },
-      after() {
-        if (this.oldObjectAssign) {
-          Object.assign = this.oldObjectAssign;
-        }
-        this.oldObjectAssign = null;
-      }
-    });
-
-    QUnit.test('override object', function(assert) {
-      const foo = {foo: 'yellow'};
-
-      assert.deepEqual(obj.assign(foo, {foo: 'blue'}), {foo: 'blue'}, 'obj.assign should return overriden result');
-      assert.deepEqual(foo, {foo: 'blue'}, 'foo should be modified directly');
-    });
-
-    QUnit.test('new object', function(assert) {
-      const foo = {foo: 'yellow'};
-
-      assert.deepEqual(obj.assign({}, foo, {foo: 'blue'}), {foo: 'blue'}, 'obj.assign should return result');
-      assert.deepEqual(foo, {foo: 'yellow'}, 'foo should not be modified');
-    });
-
-    QUnit.test('empty override', function(assert) {
-      const foo = {foo: 'yellow'};
-
-      assert.deepEqual(obj.assign(foo, {}), {foo: 'yellow'}, 'obj.assign should return result');
-      assert.deepEqual(foo, {foo: 'yellow'}, 'foo should not be modified');
-    });
-
-    QUnit.test('multiple override object', function(assert) {
-      const foo = {foo: 'foo'};
-      const bar = {foo: 'bar'};
-      const baz = {foo: 'baz'};
-
-      assert.deepEqual(obj.assign(foo, bar, baz), baz, 'obj.assign should return result');
-      assert.deepEqual(foo, baz, 'foo should be overridden');
-    });
-
-    QUnit.test('additive properties', function(assert) {
-      const foo = {};
-      const expected = {one: 1, two: 2, three: 3};
-
-      assert.deepEqual(obj.assign(foo, {one: 1}, {two: 2}, {three: 3}), expected, 'obj.assign should return result');
-      assert.deepEqual(foo, expected, 'foo should be equal to result');
-    });
-
-    QUnit.test('deep override', function(assert) {
-      const foo = {
-        foo: {
-          bar: {
-            baz: 'buzz'
-          }
-        },
-        blue: [55, 56],
-        red: 'nope'
-      };
-
-      const baz = {
-        foo: {
-          bar: {
-            baz: 'red'
-          }
-        },
-        blue: [57]
-      };
-
-      const expected = {
-        foo: {
-          bar: {
-            baz: 'red'
-          }
-        },
-        blue: [57],
-        red: 'nope'
-      };
-
-      assert.deepEqual(obj.assign(foo, baz), expected, 'obj.assign should return result');
-      assert.deepEqual(foo, expected, 'foo is overridden');
-    });
-
-    QUnit.test('negative tests', function(assert) {
-      const expected = {foo: 11};
-
-      assert.deepEqual(obj.assign({}, expected, undefined), expected, 'assign should undefined');
-      assert.deepEqual(obj.assign({}, expected, null), expected, 'assign should ignore null');
-      assert.deepEqual(obj.assign({}, expected, []), expected, 'assign should ignore Array');
-      assert.deepEqual(obj.assign({}, expected, ''), expected, 'assign should ignore string');
-      assert.deepEqual(obj.assign({}, expected, 11), expected, 'assign should ignore number');
-      assert.deepEqual(obj.assign({}, expected, new RegExp()), expected, 'assign should ignore RegExp');
-      assert.deepEqual(obj.assign({}, expected, new Date()), expected, 'assign should ignore Date');
-      assert.deepEqual(obj.assign({}, expected, true), expected, 'assign should ignore boolean');
-      assert.deepEqual(obj.assign({}, expected, () => {}), expected, 'assign should ignore function');
-    });
-  });
-});
-
 QUnit.test('utils/obj.merge', function(assert) {
   const ob1 = {
     a: true,
diff --git a/test/unit/utils/time-ranges.test.js b/test/unit/utils/time.test.js
similarity index 53%
rename from test/unit/utils/time-ranges.test.js
rename to test/unit/utils/time.test.js
index 3c40e779c..1a605d8fc 100644
--- a/test/unit/utils/time-ranges.test.js
+++ b/test/unit/utils/time.test.js
@@ -1,17 +1,56 @@
 /* eslint-env qunit */
-import { createTimeRanges, createTimeRange } from '../../../src/js/utils/time-ranges.js';
 import window from 'global/window';
+import { createTimeRanges, formatTime, resetFormatTime, setFormatTime } from '../../../src/js/utils/time';
 
-QUnit.module('time-ranges');
-
-QUnit.test('should export the deprecated createTimeRange function', function(assert) {
-  assert.equal(
-    createTimeRange,
-    createTimeRanges,
-    'createTimeRange is an alias to createTimeRanges'
-  );
+QUnit.module('time formatting', {
+  afterEach: resetFormatTime()
 });
 
+QUnit.test('should format time as a string', function(assert) {
+  assert.ok(formatTime(1) === '0:01');
+  assert.ok(formatTime(10) === '0:10');
+  assert.ok(formatTime(60) === '1:00');
+  assert.ok(formatTime(600) === '10:00');
+  assert.ok(formatTime(3600) === '1:00:00');
+  assert.ok(formatTime(36000) === '10:00:00');
+  assert.ok(formatTime(360000) === '100:00:00');
+
+  // Using guide should provide extra leading zeros
+  assert.ok(formatTime(1, 1) === '0:01');
+  assert.ok(formatTime(1, 10) === '0:01');
+  assert.ok(formatTime(1, 60) === '0:01');
+  assert.ok(formatTime(1, 600) === '00:01');
+  assert.ok(formatTime(1, 3600) === '0:00:01');
+  // Don't do extra leading zeros for hours
+  assert.ok(formatTime(1, 36000) === '0:00:01');
+  assert.ok(formatTime(1, 360000) === '0:00:01');
+
+  // Do not display negative time
+  assert.ok(formatTime(-1) === '0:00');
+  assert.ok(formatTime(-1, 3600) === '0:00:00');
+});
+
+QUnit.test('should format invalid times as dashes', function(assert) {
+  assert.equal(formatTime(Infinity, 90), '-:-');
+  assert.equal(formatTime(NaN), '-:-');
+  assert.equal(formatTime(10, Infinity), '0:00:10');
+  assert.equal(formatTime(90, NaN), '1:30');
+});
+
+QUnit.test('setFormatTime', function(assert) {
+  setFormatTime((seconds, guide) => `custom:${seconds}:${guide}`);
+  assert.equal(formatTime(1, 2), 'custom:1:2', 'it should replace the default formatTime implementation');
+});
+
+QUnit.test('resetFormatTime ', function(assert) {
+  setFormatTime((seconds, guide) => `custom:${seconds}:${guide}`);
+  assert.equal(formatTime(1, 2), 'custom:1:2');
+  resetFormatTime();
+  assert.equal(formatTime(1), '0:01', 'it should reset formatTime to the default implementation');
+});
+
+QUnit.module('time ranges');
+
 QUnit.test('should create a fake single timerange', function(assert) {
   const tr = createTimeRanges(0, 10);
 
@@ -95,3 +134,4 @@ QUnit[testOrSkip]('Array.from works on our time ranges object', function(assert)
   tr = createTimeRanges(0, 10);
   assert.deepEqual(Array.from(tr), [[0, 10]], 'we got back a ranges representation');
 });
+