I think it's interesting that the video tacks on some audio of him improvising at the end almost as if to say, "Yeah, he can play that fast."
I noticed this in the comment section below the video:
This recording seemed a bit too fast and too perfect even for the doodle master, so I emailed him, and he graciously responded: "Obviously it's been tweaked, but not for speed. I tracked all the parts in real time (no slowing down or speeding up), punching in and out like crazy, of course, to get it really accurate with no errors. ..The result sounded really good without any tweaking, but I couldn't resist so I proceeded to line up notes timewise (when needed) to see how far I could take it."