Tracking: Player Experience improvements

[vgarleanu]

This issue tracks progress for various player experience improvements.

• [ ] Thumbnail in seekbar support (#250)
• [ ] Chromecast support (#206)
• [ ] MediaSession API support (#126)
• [x] Autoplay next episode (#341)
• [x] Show more details about audio tracks (#260)
• [x] Ability to set default player quality (#254)
• [ ] HDR tonemapping (#246)
• [ ] Add nerd view to player for debuggin (#190)
• [ ] Add route for better log collection during playback crashes (#109)
• [ ] Better subtitles support, including native subtitle rendering (#162)
• [x] Audio transcoding improvements (#161) [PARTIALLY COMPLETE]
• [x] Default to direct play by default (#227)
• [ ] Web player back button (#222)
• [x] Direct play stability improvements (#281)
• [ ] Improve transcoding video quality.
• [ ] Improve video player error reporting.

If I've missed something, feel free to edit this issue and add the item to the list.