I would assume it was edited. He only joins the frequency about 30 seconds before it happens. That means tower only took control once he was 60 seconds before landing. I don't know the procedures at SFO but that seems too short.
It has been edited. The LiveATC archive has about 40 seconds between "go around" and "flew directly over us." The LiveATC archive appears to be edited to remove silence, so it may have been even longer.
