So from what I understand, you can record a gameplay video in TF2, load it up in SFM as a somewhat "base animation" so all the movements and positions are already mapped out, and you can edit the animations, sounds, models and all that jib-jab, correct? Pretty sure this is how Valve makes the L4D intro and other animations, they record in-game footage then touch it up.
What type of file does it use to import? Since the Left 4 Dead survivor models were implemented, I was hoping I could record a .dem file in L4D2 and import the models and such into SFM and edit the video to my liking.