NOTE: This video contains frustration-induced profanity. (I promise I don't talk that way all the time.) OH MY GOODNESS! WE MADE IT!! I still can't believe it! Thank you SO MUCH to each and every one of you! Now we can sit back and laugh at my most recent blunders... :)
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