Ive almost got a working script for this (basically just stole code from a bunch of addons, but im just a beginner).
/filmscene begins filming your movements to the next available scene number. Currently supports looking, moving, crouching, light, and sitting (maybe someone with more experience can add more functionality).
/endscene ends filming.
/playscene [number] will playback the specified scene (currently supports playing only 1 scene at a time).
/endscene also cancels playbacks.
/deletescene [number] deletes a scene for re-recording.
Going to add /listscene, and maybe /playscene "all" functionability.