This video features the proofreading of lists, along with an inaudible whisper. If you hear a noise in the background, that's my neighbors across the street vacuuming out their car. They only ever get motivated to do anything productive outdoors when I make videos. :(
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