[MJKam11]

I've never even attempted that, but its similar to a backwards pressure spin (or it looks like it). Try doing a pendy and then as you go back try to make yourself into a pin-wheel as you pendy back, that might be the way to generate the spin, but once again, i'm only guessing.

I just watched it a few more times and it looks like a back pressure spin, i'd try pressure spins before you try those just to get an idea of how to get the rotation.