I have a problem with this video.
realistically.... even a seasoned cop can't get out of this unharmed. and for an armed citizen with concealed weapon - their spider sense is always on - a constant vigilant situational awareness.
I wouldn't just stand there and gaze at a very suspicious person with his hands inside the pockets. It's very very obvious that he's up to something no good and you wouldn't be that close to him. But I do understand that sometimes it just happened suddenly and that's where your training (muscle memory) kicks in.
but as for "should you carry a round in the chamber" question? ABSOLUTELY!!!!!!!!!!!!!!!!!!!!!!!! I find it extremely puzzling and illogical if you (general you) don't. why???? are you scared of yourself? you don't trust yourself? if that's a case.... I strongly advice you to leave the gun at home and get a further training. It's really really really imperative to practice practice practice because CCW is very different and more difficult than open carry. Your gun will be concealed and this does increase your response time (which is bad).
Increased response time = you get stabbed multiple of times
I do several IDPA competitions a year where it's all CCW scenario. a very good place to practice where you can develop muscle memory, improve your drawing speed and get over your fear.
I've done this several times at IDPA and it would be extremely useful especially for that woman. I don't think. I just do it and I trust myself 100%. I have a very good weapon manipulation of the pistol but I just need to work on my accuracy.
Self Defense: Shooting From Retention - YouTube
I cannot stress this enough - it's really absolutely important to participate in several IDPA competitions. It's for anybody to participate. It's where a bunch of Joe the Plumbers and sometimes a few military/LEO come together and have fun. As long as you can handle your gun in a safe, professional manner... everybody's happy even if you're a lousy shot. I cannot stress this enough. You will be surprised at how ill-prepared you are in your first session. It's a reality shock and you will gain a huge respect for your gun.
Watching some self-defense youtube videos and trying it out at your home is not quite the same. far far far far far from it. You just gotta get out of there and try it out in real life (in IDPA of course) and see it for yourself. Doing several IDPA competitions will help you develop a muscle memory and it will definitely decrease your response time.