As you surelly know, the in-game record ask a lot of recources in your computer, a friend who has an ATI Radeon HD 3650 series and 4Gb of RAM makes better video than me,
I have an ATI Radeon HD 4650 series with 2Gb of RAM.
So here is the solution for the recorders, get more RAM! The more RAM you have, the better is the quality of our machinima!!!!