"The video is created entirely from in-game footage." So says the release that came with this, the very latest LA Noire trailer.
Called ‘Rising Through The Ranks’ it "takes a deeper look into the world of Detective Cole Phelps, and the various partners you will work with as you rise through the desks of the LAPD. The video outlines the game’s ranking system, the use of ‘Intuition Points’ to help solve a case, and provides information on how to tackle street crimes or ‘Unassigned Cases’."
Enjoy