Kilus on 17 March 2009
When a movie shows a street every frame of video needs new information for every frame. While when you do a street in a game the texture for the street and any objects in the street only need to be on the disc once. Not for every frame.
So lets say you load up the first level of Halo 3 and don't move for 24 hours. The game only needs a couple of hundred mega bytes on the disc for the game level. Where as if it was 24 hour video file of the game level it would take several Blu ray discs to hold the file.
