Few weeks ago in one of the local grocery shops I stumbled upon the apple core remover. To be honest I didn't even know that something like this even exists. I fell in love with this clever tool. Not only it is very easy to use, but also helps you to save more food!
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