Honestly, not sure about the clutch question. It sure happens a lot when I'm releasing the pedal. I think it's more of a releasing issue. But that's one thing to test later or tomorrow.

I'll also have the wife be outside to see if she can spot the source of the sound. Or order a cheap usb microphone to place under the car in different locations.

I did back up first thing because the spot I park at as a tree righ in front, so I always have to reverse. But I've tested that it doesn't do it in first gear even if the first thing I do is go forward. But I'll test that again.

After driving, it basically stops. I've just made another video. Better sound: https://www.youtube.com/watch?v=F9-776vCjaI

I just test drove it for about 5 minutes and the sound was almost if not entirely gone.