Vanquish has just made me aware there is a hidden feature (may need recompiling, or some secret code to activate) that is a built in screen recorder. I'm going to place my bets on that. Now if only a developer will explain to me how to activate it.
Yeah. Frankly I'd just do pause then alternate between pressing F and P over and over until you've recorded what you will. If you want something fancy, then yeah, make a video option for compiling \o