Let's catch up on our Page-A-Day designer shoe calendar! I haven't updated it in a while (not since August), so let's take a look! (If you'd like to see more of the calendar in a similar show & tell video, just let me know in the comments.)
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