Source Filmmaker is a video creation program developed by Valve on Source game engine. ###Usage Valve uses Source Filmmaker to create trailers and short movies on their games. The most notable video series made to date is Meet the Team and several Team Fortress 2, Left 4 Dead and Left 4 Dead 2 videos. Usually, Source Filmmaker is used in cases when the creators need to dynamically change the character's facial expressions or much more cinematic movement animations. The capture process is fair...