sorry for the 12 seconds of blackness at the beginning of the video. I'm still learning how to edit my videos so there might be some weirdness here and there in the process of it all. 😅
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