The reason it looks like pure demo is that I can't see his head turn to look before his body turns. Maybe it's just the quality of the video. It's the focus that can make or break a form. It's also done at pretty much the same speed throughout, rather than differing the rhythm with some moves.

I don't know the form he's doing, so maybe that's the proper way to do it--very quickly and at the same speed. Even his pauses seemed like he didn't stop but was still going. Maybe that's how the form is supposed to be done. Dunno. But, the man obviously knows his stuff, and has known it for a very long time, no doubt about that.