The only example that applies to this conversation is the first video. Being women, they absolutely needed capacity in their firearm. If they were men, I guarantee the assailant would not have been so aggressive. The other reason to a higher capacity needed is that they are running a business, just like one of the other videos with multiple attackers, a revolver as your only firearm is not a good idea in a risky business. Having the revolver, albeit a powerful one, on his person at all times is a good idea, but a backup hi cap should have been what he should have been trying to get to in that situation. Fending off multiple attackers with only a revolver tells the attackers one simple thing, "I have nothing else". He could have at least pretended to be going for something else, the attackers would have fled immediately.
All the other videos are irrelevant because they involve law enforcement. They all should, and did, have hi cap firearms and just goes to prove that caliber matters. Self defenders are not law enforcement, self defenders do not go on the offensive. I can tell you a Walmart story where a courageous man went on the offensive and didnt get a shot off. A woman with a high caliber revolver, 1 shot him single handedly. That man lacked the critical thinking skills.
On the other videos with law enf, the officers showed restraint for one reason or another. That must never be done as a self defender. Once the gun is out you will use it, or suffer the consequences like the man fighting multiple attackers.
I notice no one brought up my argument for critical thinking skills. Drawing up a plan under stress seems to be a quality that is unbelievable, and the unbelievers choose to compensate with circumstantial training and capacity. By circumstantial training I mean running what if drills, usually on inanimate targets, in scenarios that may be likely. But a wise man, and critical thinker knows, nothing ever goes according to plan.
Tactics are for police, and criminals alike. The criminal chooses the time, place, and tactics. The police choose a tactic of response, their numbers and their radio and training are their strongest tools, not the gun.
A self defender has one job, Live and protect those near you. Property is next priority, and the defender must know what value is at stake and arm themselves appropriately.
A wise man, and critical thinker, will know how to make maximum use of their firearm, low or high cap, can count rounds, the other shooters rounds, know when to fight or retreat and also use environmental tactics that no one, NO ONE, could have ever trained for.