Our lovely frizzy haired lady is back, this time working in a school supply store. (Oh, how I wish that was actually a thing this time of year.) Let's see what she has to sell!
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