A very old video, but still entertaining. It wasn't a privately registered super-expensive AK, it was a dealer sample or manufacturer's reference sample or something like that. The guy in the video is over on warrifles.com if any of y'all want to talk to him. He admits it was dumb. I bet he has already been flamed enough at this point.
My only real problem with this stupid exercise is that he only fires about half of the last magazine so there is a round in the chamber when he whips it around at the camera guy... with the stock on fire. They are both lucky it is damn hard to "cook off a round".