I know a couple other content creators have offered great advice on this subject, especially GentleWhispering. I just wanted to add the tips and tricks I've developed to keep tingling as often as humanly possible. Because a single tingle is never enough. Please share your own advice below--we can all benefit from it! And, for the love of waffles, please use headphones. Bonus fake internet points each time you spot Etienne running around like a crazed beast!
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