I got a ton of tingles while editing this one! I hope it works well for you too! :) I was inspired by this awesome video: https://www.youtube.com/watch?v=8oKELKXTm1g
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