I found the StartRecording(int) function while using StartCutScene(), and when I looked in the in game help file there was no reference to it.
Any clue to what it does?
It records the movements you do while playing a game , and then it can play it back.
It can be used for writting walkthroughs.
It's not yet an official command that's why it's not documented
It was going to be a scriptual equivalent of pressing Alt+R but it is not yet implemented, thus not in the manual.
It shouldn't really be in the autocomplete list, that's a mistake.