I filmed this with a bruised finger so it was quite difficult to be as fast as I wanted and my headphones broke so I had to use my iPhone microphone. I hope it’s still enjoyable for you guys though :)
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