Proper surround sound playback with video

**Is your feature request related to a usage problem (not a bug)? Please describe.**
To my surprise, FreeTube supports 5.1 surround playback, but requires Settings > Default Video Format > Audio Formats so higher audio bitrates are selectable. However, this will freeze video playback since it's an audio-only mode.

**Describe the solution you'd like to see implemented**
Allow selecting [highest/surround bitrates](https://i.imgur.com/4VF0iTU.png) during regular video playback

**Describe alternatives you've considered**
Not really solutions but here are other methods of YouTube surround playback I've tried:
- Downloading video using [JDownloader](https://i.imgur.com/00Pb9so.png) and playing it locally
- Kodi media center using [YouTube addon](https://i.imgur.com/DwuJrxL.mp4)

**Screenshots**
https://i.imgur.com/r20Uqfb.mp4
Recorded using virtual surround so anyone can listen to the surround effect on regular stereo headphones.

**Additional context**
On a side note, YouTube also supports spatial audio, which requires less channels (4) yet is capable of 3 dimensions (with height) thanks to the Ambisonics format, which is supported by OpenAL Soft, an API that can render it on headphones in case VR/360 support ever gets implemented and plugins like [SoundField](https://imgur.com/dojpDfp.mp4), which allow decoding it into virtual surround.