I saw this recently and hafta believe its staged.
Just no way someone could fire 6 shots, all squibs, and then reload, with the next batch also being all (at least the 1st 2) squib loads.
If they were light loads done on purpose, the shooter would have likely been the one to load them, and would know that no rounds impacted.
Basically a very experienced dumbass to pull a stunt like this, IMO.