The only thing I learned from the video was the fact that the police have to secure the area before the paramedics will treat the victims. What I got from the video is that if I call 911 for a firearms related injury to me or my family, and I feel that I am secure, I will tell the 911 operator that there is an accident and paramedics are needed, that is it. The cops show up anyway, but the quicker the better, am I right?
If the paramedics arrive first you may still be in the same boat as if you told the dispatcher it was a firearms related injury. The first thing EMTs are trained to do as they near a scene is to assess scene safety. If they feel the scene is unsecure for any reason they will wait for police to arrive and secure the scene before they procede.