YouTube mobile site 4k+ resolution

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Description of the issue:

When attempting to play YouTube videos which have up to 4k or 8k resolutions available on the mobile site the only playable resolutions that appear go up to 720p, despite my screen being capable of 1080p and 1440p. If the videos max resolution is 1440p/quad hd (my screen is quad hd+) or below 1080p and 1440p options are available. This does not appear when desktop site is enabled and it does not occur when using other browsers.

How can this issue be reproduced?

  1. Go to a 4k or 8k video on the mobile YouTube site
  2. Click playback settings
  3. Look at the resolutions

Expected result:
1080p and 1440p options on 4k and 8k videos on the mobile website. 4k options should appear too like the desktop site.
Brave Version( check About Brave):

Brave 1.12.113

Mobile Device details

Galaxy s9+/ SM g965u running Android 10

Additional Information:

Phones screen resolution is Quad hd+ and is set to that.

Might depend on the video (and maybe device). Testing on my Oneplus 6

Testing this video (with offers 1440p/4k): https://www.youtube.com/watch?v=sy8K2VmWkDo