I watched the video. The sheriff just stated the obvious. If you were a LEO, and were dispatched to situation where an individual or individuals had a gun in plain sight, what would be your first action? I'm not a cop, but I sure as hell would want all the firearms (except mine) out of the action.
As a private citizen, I feel that concealed carry is the safest way for me to have a firearm on my person. And, per the concealed carry laws, it is up to me to let the police know I have a concealed weapon. I live in Michigan, which permits open carry. There have been several publicized events in recent weeks where proponents of open carry have gotten lots of news coverage of their activities with visible holstered weapons. Frankly, it makes me a little nervous to be around people like that, and I've carried concealed for many years.
One other point: There are people - and I'm one of them - who feel that the individual carrying openly would be the first target for bad guys in a Stuff-Hits-The-Fan situation. Why advertise to someone who is out to do evil that you are a threat?
I don't want to sound flip about this because drawing a weapon means you are putting your life at risk.....but if the situation ever arises wouldn't you rather see a shocked look on the bad guy's face as you put a couple of rounds in center-of-mass? Way better than trying to survive someone slinging lead at you.
Steve