I believe this has been brought up before. It's a fake. You can tell it was rendered just by the way the being moves, and the shadow that appears
when the man opens the door is extremely awkward and appears to be looped. It's a decent CG display, though.
I saw a video interviewing the guy who made this, he MoCapped the motion which is why it looks so realistic. It MAY be the same dude who did the Haiti
video tho not 100% sure, but there is a video of him talking about how he made this.