NOTE: My mom never watches my videos, so don't worry about me spoiling the surprise. If you saw the "Paint With Diamonds" project I was working on, this video is about that. I took it to be framed and just got it back last night. Let's see how it turned out!
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