Hello! There's no screen today! I was going to leave it as a black screen because I didn't have anything suitable, but I was bored so I tried using the photo from the thumbnail I lost last time. Haha. Listen carefully~!
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