I believe that this is the first time that I've ever seen a reenactment crew use loose powder and a ladle to load a gun, instead of following modern safety guidelines that call for shaped foil cartridges. When I viewed this vid for the first time, I thought they were thumbstalling the vent, but then realized that they were holding their forefingers on the vent to stop powder from being blown out when the man with the rammer was in high gear. I probably shouldn't have used "reenactment crew" to describe these fellows, because they're evidently performers putting on a show for an audience; but any way you look at it, they should have recieved a little more training in how to safely load and fire a cannon.