Good video for demonstrating concealed carry draw.
One thing that they do not do, that you can do when practicing, is after you fire; come to a guard position, scan for more threats, then holster without taking your eyes from looking downrange. You should learn to holster you weapon without looking at your holster.
Guard position is where you have you handgun pulled in somewhat to your torso, pointed downrange, but downward at a 30 to 45 degree angle from horizontal, finger off the trigger (because your sight is not on a target).
Assuming that you do what you practice, practice what you should do in a defensive shooting situation. Keeping alert for threats after you have neutralized the obvious threats might be beneficial.
NRA Life Member - Orange Gunsite Member - NRA Certified Pistol Instructor
"When plunder becomes a way of life for a group of men living together in society,
they create for themselves in the course of time a legal system that authorizes it and a moral code that justifies it." Frederic Bastiat