as I saw from youtube videos PC and Xbox add-on replay systems seem same. So basicly you decide when to start and stop recording. I usually start around 1000ft. on approach then replay with different cameras while recording to externall HDD.
There were a post I have opened including PILOT / 0083 video and my very first attempts 
Btw, I know the sim is currently in a bad situation with SU9 and WU9 but I still can use replay.