I don't know if that's the same guy or not, but back in 90's on several occasions, I used to see a guy doing that exact same thing on the sidewalk downtown on weekend nights. When he would finish one, he'd take a lighter & spray clear enamel across the flame, making a blow torch, which he would dry the paint with. Was selling them for about $25 bucks apiece.
But the basic technique he used, as well as the cosmic, sci-fi theme of the art, with the pyramids, planets & stars in space was exactly the same.
I think he was from Miami & I wouldn't be surprised if the guy in your video was the same guy
He didn't work quite as fast as in the video, but what I saw was 20 years ago.