I watch a fair number of videos posted like this.
The three observations from the vid here are the same as the rest.
1) These encounters are usually at VERY close range.
2) They happen very fast.
3) They are a complete surprise, meaning the gun is in your face as soon as you realize what's happening.
Which leads us to todays lesson...
1) If you don't carry with a round chambered you might as well leave your gun locked in the safe.
2) We can argue about safeties in another thread. None of my striker fire guns have thumb safeties, which is what I carry. (1911 style pistols I "might" carry are cocked and locked.)
3) Be damn sure you can draw from your holster quickly and discretely with one hand. I have more than one custom leather holster that carries well, feels great, but doesn't draw well like you saw in that video. I am slowly abandoning leather for kydex for that reason, unless I know that pistol will draw smoothly and quickly every time.
Well said my friend.
Btw video is toast now.