If you are quick, you could get videojs to wrap the HTML video element twice on iOS. The video element has to be recreated after moving on iOS but we weren't re-associating it with the player object. When autoSetup swung through, it would re-initialize the video element and create a player within a player.
Hide volume slider and mute toggle when the current tech doesn't support adjusting video volume. Added controls specific test cases. Volume-related controls retest whether to display themselves whenever `loadstart` fires.
