lint

sandbox/load-media.html.example

@@ -19,7 +19,9 @@
 
   <script>
     var vid = document.getElementById('vid1');
-    var player = videojs(vid);
+    var player = videojs(vid, {
+      mediaSession: true
+    });
 
     player.log('window.player created', player);
 

src/js/mediasession.js

@@ -117,6 +117,7 @@ export const initMediaSession = function() {
   };
 
   this.on('playing', () => {
+    // Called on each `playing` rather than `sourceset`, in case of multiple players on a page
     updateMediaSession();
     ms.playbackState = 'playing';
   });