While this is an officer involved shooting, there are many lessons applicable for the civilian Conceal Carry world as well. Primarily, this shows how quickly an encounter can turn deadly.
The message we get from the anti-gun crowd is that cops should be the ones to handle the situation, not CCW holders. The problem with this argument is twofold. First, officers take time to arrive – citizens are the first responder 99% of the time. Second, lethal force is never announced with a megaphone and flashing signs. Lethal encounters are sudden, very violent, and over quickly. Citizens do not have the time to wait for the police to arrive.
When an encounter, be it officer arresting someone for a non-violent crime, or citizen simply walking down a street, it is important to be mentally ready to instantly defend against a lethal force threat.
There are many more lessons to be learned from this video, such as empty handed skill, transition to deadly force tools, and staying in the fight when injured, but John from Active Self Protection covers them quite well in his video.