1. Make people knowledgeable about psychopathy. At least 5% of any population are genetically psychopathic. Supposedly it is closer to 10-15% in America right now. This also doesn't include secondary psychopaths or sociopaths that learn to adopt these same traits.
Without knowledge about them, what may cause secondary psychopathy, who is psychopathic, or how it is significant socially defense against these types are inadequate.
2. It is the logical conclusion of defending against psychopaths that actively co-opts groups relying on violence as defense but by principle being unable to initiate violence. Again, being able to identify sociopaths/psychopaths is important here in order to prevent these types from co-opting groups gaining influence and power in the first place.
3. What do you not agree with?
4. Violence begets more violence. Vendettas are real. I'd think most libertarians dislike government specifically because it monopolizes violence to enforce 'acceptable' behaviors. The destructive violence of nature is balanced by collaboration (parent defending offspring, traveling as a herd or pack, predators not overhunting, etc) otherwise it wouldn't be sustainable. All living things would just kill each other and be done with it.
There is psychopaths which follow the laws.. but for those that don't. as long as the large majority of non psychos can have the ability to defend themselves there is not really a problem.
The issue is simply that many people are still unaware of psychopaths so they can manipulate their way to positions of power and then abuse that power. E.g. the arms race and then provoking war. The videos should make it clear that not all of them are serial killers as hollywood depicts. And with power they can use it to further increase their control. (e.g. media, money, weapons)
The defense is very simple, educate people to be able to identify sociopathic/psychopathic behaviors and deny these types positions of leadership. People that display absolutely no care for humanity, the environment, promote discrimination, etc are likely sociopathic but may be perceived as leaders because of their confidence and poise. Empathy is necessary for society to operate. Without it, there is only social Darwinism with ruthlessness being the strongest trait.