Well, the video isn't available. And it's a big ask to make way out there claims and then expect people to watch whatever that video was to fully understand whether the claims are true or not. This is basically asymmetric warfare in trolling.

"Here's my wild claim, to verify it go spend your time watching a video!"

I saw the video a few days ago. It uses some napkin math but the author does at least use a spreadsheet / toy model to arrive at their conclusions.