Fix MediaMetadata setter

src/renderer/components/watch-video-info/watch-video-info.js

@@ -228,12 +228,20 @@ export default Vue.extend({
     }
   },
   mounted: function () {
+    if ('mediaSession' in navigator) {
       /* eslint-disable-next-line */
       navigator.mediaSession.metadata = new MediaMetadata({
         title: this.title,
         artist: this.channelName,
-      artwork: this.videoThumbnail
+        artwork: [
+          {
+            src: this.videoThumbnail,
+            sizes: '128x128',
+            type: 'image/png'
+          }
+        ]
       })
+    }
   },
   methods: {
     goToChannel: function () {