I didn't watch the whole thing, but the gist of it seemed to be that guns don't just help execute crimes, but also help stop it. It just seemed to list different massacres that had occurred after the restriction of weapons.
First of all, I 95% disagree with this video. But I'm not really surprised since it's obviously funded by pro-gun institutions. It almost seems self-contradictory by condemning violence with the use of firearms, and then glorifying potential violence with firearms. It seems to suggest that all of these killings of innocent people would have been prevented if everyone had guns. I feel that, if anything, more guns would have produced even more deaths. I'm not saying people shouldn't have a right to defend themselves, but I do not agree that giving (untrained) civilians the power to easily take lives.
Firearms should only been available to those deemed responsible to handle them. Military, law enforcement and hunters (who have proven themselves responsible) are the only people that should be allowed to own firearms. Self defence is not a valid argument to own a firearm.
"An eye for an eye makes the whole world blind" - Mahatma Ghandi
If you want to defend your family, community or even country from violent crime then you should join the military or law enforcement. Enabling any civilian to own a firearm is just allowing irresponsible people to commit the violent crimes that we have been hearing about in America. Guns in America are either marketed as hunting weapons or self defence weapons. The latter are guns made for one purpose and one purpose only. To inflict violence on other human beings.
The United Kingdom has a very good system for the control of firearms, which allows people who can prove themselves to be responsible to have access to firearms. As you can imagine, gun crime is extremely low in the UK, even though thousands of people own firearms. And even though gun control is strict, we haven't been massacred, unable to protect ourselves. Even if we were invaded by bloodthirsty killers, it is the job of the military and law enforcement to keep us safe, not civilians.