For a few seconds during the GTA IV trailer, the footage went insanely fast. For these parts with important stuff (like people and cars), I made 5X slower to get a better look.

The sound can get annoying so just turn it off on the player using the scroll bar above.

Some interesting said in this thread-

Xamine said: just thought id let you guys know... the people never crossed the streets.. look at it.. they walk to the end of the sidewalk and walks back. never crossing the road.

hes right they keep walking up to the end of the street and right back which is kind of weird.

There also seems to be pedestrian smokers which I think is new for GTA. Overall the people look a lot more detailed and more interesting.

Also during the last part look at the shadows. some are a lot shorter than others... are there kids in GTA?