It's not really teaching you french- more just explaining why I these words are funny or my favorite. Ça ne t'apprend pas vraiment le français - ça explique plutôt pourquoi je trouve ces mots drôles, ou pourquoi ce sont mes préférés.
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