That video is eye opening on several levels. You can learn about and believe how fast someone can exsanguinate from the femoral artery, but to see it happen in real time is a different story. In terms of saving that guy's life, it was very, very fast.
On the other side, there are two important self-defense points to note. One, from the point of view of how much time that guy could have kept fighting, it was a long, long time. He could have done a a lot of damage in the time he had left had he not made the decision that he was done.
Second, it also illustrates how stupid it is to believe that shooting someone in the leg is somehow less lethal than targeting the more preferred areas for the quickest end to hostility. How many times have we heard "they didn't have to kill him! Why didn't they just shoot him in the leg?"
Agreed.It's both fast and slow.
Slow if you still have to fight the guy.He has plenty of time to pull out a gun and shoot you multiple times.
Fast if you want to save the guy's life.No time to run to your car parked 100 yards away to grab your first aid kit in the trunk (that hopefully contains a tourniquet) and get back to your bleeding victim.
Also how it's important to locate the source of the bleeding before you apply a tourniquet.