I thought i should correct you here: The ONLY clip which has gotn some "touch up" effects is the very last clip showing some blood/dirt on the lens of the camera. *Everything* else in this video is straight from the sim.
Also, saying that this movie might as well have been a bunch of screenshots is a little "far out there".. If thats the case, why would *any* developer create trailers/teasers for their games, if screenshots shows the same thing? ;)
Besides, it took around, guessing, 7 hours in total to create this teaser from the ground up.
For the rest of you, thanks for the comments :)