While its not a down-to-the-finite-details replica of the Grand Theft Auto IV trailer, it's pretty darned spot-on. If you factor in that he made it using only clips that he could find on YouTube, it's even more amazing. When they cut to that one shot of the actor ... you'll be wondering if they used that for the actual game trailer.
It's even more impressive that he was able to make it so close to the actual thing within his YouTube confines. Does this mean the GTA IV trailer-creators used very familiar scenes in and around New York? Or is it a sign that YouTube is just that much closer to taking over the world?
We may never know.