Kinda hard to take a video while you're riding and I doubt the sound would come through very well.
I solved mine though. Mine was the chain. A few minutes after I posted I thought about it and I'd just serviced the chain about a week ago and tightened it a little. Nothing was wrong for a few days of riding then suddenly it started.
I put it up on the stand and spun the back wheel and I could easily hear the chain squeaking. So I loosened it back up a little. I had marked the tensioner bolts before I adjusted them so it was easy to put it back where it was. Then I lubed it again. Problem solved. Took a 3 hour ride. Not a peep.