[jurmous]

I have YouTube premium and I have access to experimental features and coincidentally they offer one feature called audio in high quality. So they are working on improving it.

Description:

High-Quality Audio

Available until February 22

With high-quality audio, you can listen to music on YouTube in the best audio quality.

How it works: Watch an eligible music video on YouTube and enjoy the benefits of higher-quality audio.

Only available on iOS and Android.

[nemomarx]

why only on mobile? very curious

[guyzero]

likely end-to-end drm