Hmmm,
I disagree David, this is not hard to do at all, it’s just laborious. This is a very well done piece, overdone perhaps, as a lot of the movement has been aided by moving the layers, not just the camera, something I often do to help this effect. I can’t imagine how this person makes this economically viable for his clients, they either have a lot of money or time or both. But I suppose if the guy plans these out well, and shoots a bunch of these foregrounds on greenscreen, then maybe it’s not so expensive. At least that’s the way I’d do it, or go insane with all the masking.