Hi Chris,It looks to me like a reporter running, as you can see an over the shoulder Camera bag swinging while he is running down the slope.He appears to come from the same location where Sitzman was interviewed and filmed on the Knoll, see Video below.His right and left hands are raised, and he appears to me to be writing on a notepad or lighting a cigarette, as he is running down the slope.
There are a couple of photos showing Zapruder leaving the area. He and Stitzman are both at the top of the stairs heading East. Edit: Altgens 8 is the first photo, not sure about the second one.
They can be seen in Altgens 8 and in a few of the Bell frames
Re: The Patsy Paschall film.Here they are, just having come down from, and moving away from the Pedestal.