It's completly crazy idea: a gamemod that allows you to record the players positions and motions, and then, you can do a kind of replay.
There is a flygame (lock-on i think) wich allows u to record your friends motions and to play it in solo and people are using this so make crazy videos.
If i want to make a robbery video with a cop chase, i'll just have to ask some friends to play in the game as cop or robber and i tell them when they have to die and where to go.
I record the players motions and then, i just play it and i record the scene from differents angles