Now this is more convincing! A physical thing, on reasonably high-quality video, rotated and fiddled with. And yet it doesn't quite banish my skepticism completely--there's a little of the absurd about it.
The story given by the poster is obviously bullshit, but that doesn't mean it's not real. It's not as if he's going to be dumb enough to just come out and say something like "Yeah, I'm a pro photographer who takes pictures for Apple's print ads" or what-have-you.
The idea that Apple's legendary secrecy's been cracked is delicious. Commenter TJS's psuedocode algorithm for what should happen next is excellent:
Case: "Leaked Prototype"
Fire source from job
Case: "Handmade Mockup"
Video of 'Leaked' Next-Gen Mac Mini? [Macrumors] (Thanks, Moosedesign!)