Hey guys! While editing I realised how ENTITLED I sound during my M&S rant lol. Not going to lie I've been going through some stuff so it actually felt good to complain about something a bit more shallow.
To listen while using other apps, switch the player to Picture-in-Picture (PiP) during playback — it keeps playing in a small floating window (the screen stays on).
To listen with the screen fully off, in-browser playback stops by YouTube's design. Open the video in the YouTube app to keep listening where background playback is supported (e.g. with YouTube Premium).
Open in YouTube app