I had a request in my list to make a video of just eating a pickle, so here we have it. To the person who requested it, I apologize for taking so long to get to it. I hope you enjoy it! No, I didn't eat pickles non-stop for 40 minutes, nor did I take 40 minutes to eat a single pickle. It's just looped for 40 minutes.
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