As far as I know the only Potatoes who have the horsepower to record are Prestige, Jax, Ivan and Phinkydo. I think Prestige was the only one in the barn after the reset so I don't believe there is any more footage unless someone else in attendance was recording. Knives did confirm that Blubaustin was the gunman in another thread. I think it is pretty clear that CPD are full of it and not in it for their stated purpose if they keep him around.
-Carter