I recently stumbled across some screen shots I created 4 years ago while on Mass Effect 2. These pictures are from BioWare's flavor of Unreal/Kismet as I worked heavily behind the scenes scripting to stand up almost 75% of the cinematics.
I would start with cleaning up and exporting files out of 3dsmax. Then importing the animations into Unreal and building this Matinee with automated tools we developed on the first game.
I would then wired in characters, cameras, conditional information passed through the scene, dialog selections, as well of a slew of features that basically pause the game, starting a cinematic mode and back. Depth of Field, gun selections, lighting, vfx and audio ques are all wired in.
Here's an example of a finished sequence of cinematics with branching scenes depending your choices throughout the game.
Good times! :)