the part around the 41 second mark where he flips open the cover concerns me a little, notice him placing his left hand on the hinge area for support. i wonder if maybe it comes off too easily.
Or it is a completely natural gesture when rolling up the cover in a certain position to help create the stand ...
From the looks of things it didn't use one? (Or at least I managed to completely miss it.)
There's no hinge. He turns the iPad completely around at about the 0:25 mark. That's a pretty big aesthetic difference.