Due to a prolonged downtime of the FFsplit download-page, I searched and found a good (or even better) alternative for recording simulation sessions: The Open Broadcaster Software.
I am testing it right now on an old pc with three webcams, and it looks good so far. Unlike FFsplit, it is still supported and development is going on.
I will keep you updated and maybe post a OBS-specific installation guide.
LowCostSim - Medical simulation on a shoestring! 