In defense of both the feller in the demo and the feller here on the forum, the demo is geared toward precision shooting at a table using a benchrest to shoot at a paper target, and likely he will be cleaning the bore between shots. The gentleman in the demo is my friend, Balazs Nemeth from Hungary and competes in International Muzzleloading Matches representing his country. "4v50Gary" has likely competed against Balazs. Granted, it would have been better for the rifle to be resting against a loading bench so the muzzle would be angled away from one's face. But it is difficult for a competitor not to have his hand over the muzzle. He used thumb pressure to start the mine ball. His hands will be holding the ramrod in line with the muzzle. A competitor shooting a round ball & patched rifle will always have a hand over the muzzle if he is using a ball starter. Both types of firearms will have one or two hands gripping the ramrod in line with the muzzle.
Our friend here on the forum is evidently a North-South Skirmish Shooter and is involved in a "horse of a different color". In N-SSA team shooting, rapid-fire is the name of the game, cutting a stake in half, or busting hanging clay pots. I suppose "cook-offs" are more likely with that type of competition. I remember my years in the N-SSA back in '62 to '65, and safety was (and still is) paramount. I don't remember doing much in individual competition as opposed to team shooting, so I don't remember if I was allowed to clean between shots.
Balazs, however is a member of the International Muzzleloading Competition fraternity, and cleaning between shots is imperative for him for paper target group accuracy. For this type of shooting, a "cook-off" would have to be a rare occurrence. In my years as a national-level competition shooter at the NMLRA Championship Matches from 1972 to 1999, I never heard of one's rifle or s/s pistol "cooking off".
I appreciate our friend here pointing out possible infractions. Vigilance and concern for one's safety with muzzleloading firearms is aways worth noting.