Timestamps: 00:00 intro 00:49 different tongue fluttering (simple, cupped, with voice) 10:03 hand sounds & tongue fluttering 13:10 collarbone tapping & tongue fluttering
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