Whether real bullets or blanks are being shot the lower frame rate may/may not capture the flash.
Just so we know we're not totally getting duped on this video - is someone on record saying that they contacted the Hamilton Township, NJ police department (609) 581-4000 to confirm this incident did or did not happen? This township is a suburb of Trenton, NJ and there are two likely 7-Eleven locations 2582 Whitehorse Mercerville Rd and 2071 Whitehorse Mercerville Rd, Trenton, NJ 08619. Do we care if this attempted robbery actually happened? Because if it's fake/staged then we are all debating a cartoon.