I imagine they used a program like 3DS Max, Maya, etc to render out an animation using high poly models of the characters(for things like the Revan revealtion movie) or objects(for things like captured by the Leviathan). It's possible to replicate this in a mod, but it's a lot of time and effort.
1. Create high poly, detailed models of the characters and/or ships, scenes, objects and props required.
2. Skin the above models.
3. Rig the above models for animations.
4. Set up the animation.
5. Render at a decent quality(not much of a problem if it's just at the same res as the game, they do pretty small animations, a decent quad-core could render a short animation relatively quickly(an 1/2 hour to an hour for 30secs, given pretty decent render settings). If you want a highly detailed HD movie, then it'll take ages.
6. Re-encode to .bik format(horrible format, imo. It'd be better to find a workaround so it plays .avi or MP4, etc)
Last edited by Tangster; 01-02-2010 at 07:35 PM.