(There's something funny about these videos, but I can't tell you what it is.) I'm back with more neighborhood gossip. Allegedly. Things have gotten better around here! Come find out why!
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