Okay I make a list.
1: Make sure you have CA selcted.
2: Press f9 (unless hotkey is selected otherwise) the FPS counter in the top left should now turn red.
3: Record in game and have fun.
To pause press Ctrl + f9 (unless hotkey is selected otherwise) The FPS will turn green when recording is paused.
To stop the video press f9 again. The FPS will return to green.