Ad guy time-wasting on YouTube

The only reason to watch the above--and it may be a really good reason--is because this is allegedly of an "Ad Guy Playing Unreal Tournament at the office." Nothing much happens, except that it would be much fun to figure out which ad agency this is allegedly taking place in. From what's out the window, it's fairly obvious this is taking place in midtown Manhattan--could it be McCann, or BBDO maybe? Anyone who wishes to guess, please post your theory below.