In both of the scenes where Marty is reviewing the tapes the psychologist made with Aaron, the footage and lines in the tapes are different from what we saw and heard in the scenes where the videos were shot. For instance, in the full scene where the doctor asked Aaron if his girlfriend was sleeping with anyone else, he didn't answer. But in the tape, he quickly says, "No, no". Totally different takes are used for the tape footage. Takes me right out of the movie!