This video is soft spoken (soft voice), if you like it I will make more from time to time with my "real voice". Sorry if the speech rate is so fast, I had little time to make the video and did not want to start it a 4th time. I will speak less quickly next time.
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