If you break down what he really did there:
He pops a molly... I mean ollie and basically starts a flat land fs 3 with a nosegrab, lands on his tail still holding his nose and butters it around to finish the 3.
I guess you could call it a tailblock 360, seems appropriate. I'm gonna try this myself, looks fun.
I'd start with these.
- nose grabs on lock on small features
- switch bs 180 into tail press (like a 90 and tail press it around) - that should give you the landing/finish part.
- flatland fs 3's
Thats how I'm seeing it anyways, somebody else might have other ideas how to do this, it doesn't look that difficult. To answer your question though you need to ollie.