That is probably one of the worst fake trailers I've ever seen. The acting is atrocious! There are porn movies out there with better special effects than that!
And I'm 200% sure it's fake. The video says it's from 08. Right now it's 2010. If they made a trailer back then, the movie would be released by now. Not to mention that the trailer was never released online or in theatres. Or the complete lack of news regarding scripting, directors, casting, or any news regarding the film at all.
So unless they secretly hired a guy to film the movie in his back yard with the lowest budget for a summer blockbuster ever, and then subsequently decided not to release it after showing the trailer in just one theater, this is faker than Cher's face.
Never start with the head; the victim gets all fuzzy!