Here's some text from Newsweek (I'm not bothering to proof read my typing):
"As for the game, its story cleverly fleshes out off-screen moments only alluded to in "Reloaded" drawing upon two of the supporting characters from the movie, Niobe and Chost to serve as the stars for the game. Thanks to the power of today's machines, Enter the Matrix manages to re-create much of the rush you get watching the movie, with everything from running on walls and wire-fu fighting; the game's combat was created by the film's Hong Kong stunt team-to bullet timeand guns. (Lots of guns.) There's even a text-based game that lets you "hack" into the matrix using DOS commands, as another way to upgrade your character and unlock secrets. "You don't have to see the movie to play the game, or vice versa," say Dave Perry, whose company, Shiny, is producing the game. "But if two people are sitting next to each other, and only one of them has played the game, the gamer will have a deeper understanding of what's going on."
Also, somewhere in the article it mentions that the video was shot on the same sets and stars for the game.
The story also mentions cool things like how there will be a climactic battle like we've never see before that's 17 minutes long and cost alone about two thirds of the budget of the first "Matrix" (which was 65 million) That scene is in Revolutions.
Then that highway chase you see in the preview is a 2-mile looping highway (complete with several exits and on-ramps, plus an overpass) they built just for the movie.
If you want to read the story, which talks about everything, even has side by side photos of copycats, like Max Payne, or what the movie got it's ideas from, it was the January 6th 2003 Newsweek.