Xiaomi has already moved to HyperOS 2.2, but since not every device is eligible, some are still getting HyperOS 2 updates. The last build that arrived for the Redmi Note 12 5G seems to have broken YouTube Playback. However, it seems exclusive to a few regions and might have even been fixed.

The past few months have seen Xiaomi compete with Google and Samsung to roll out the latest patch update. Aside from bringing the latest security patch, these updates help to fix bugs and optimize system performance. Of course, they introduce new bugs, which seems to be the case with the stable OS2.0.1.0.UMQINXM. Given the build number, the update is for Indian ROM users.
According to reports, the recent update for the Redmi Note 12 5G broke YouTube Playback. We understand no other country is reporting the issue. Nonetheless, if you have yet to install the affected build, we recommend ignoring it and waiting for a new update.
Details of the YouTube Playback issues in HyperOS 2
It’s not often we see an issue with YouTube Playback, but Redmi Note 12 5G users are having difficulties using the app. According to reports, YouTube Video Playback lags in the device while Audio and Video are out of sync. Additionally, YouTube Video Playback is stuck or not responding for some people. Irrespective of how the issue is affecting your device, we understand it has been fixed.
Unfortunately, we do not know how the fix was carried out. Perhaps a new build is rolling out, but that seems unlikely. Nevertheless, if you are still having issues, we recommend checking for a new system update.