A few things come to mind after listening to the whole audio.
1) The cops were IGNORANT OF THE LAW and/or Directive 137
2) The Lawful Gun Owner, was a little too mouthy arguing with an IGNORANT cop with an attitude problem, and a drawn weapon. Escalating the situation, that only led to the second cop "forcing him to comply".
3) With several states becoming/considering/passing, new open carry laws, this is becoming more common.
4) There will always be IGNORANT cops, not all, but some.
5) Until those cops become LESS IGNORANT, and you are lawfully openly carrying, DON"T ARGUE!
This all could have been avoided, if he put his hands on his head, got on his knees, let the IGNORANT cop take the weapon, than discuss the permit in his wallet, and directive 137, hopefully a Sgt. or Commander, would have shown up, he would have checked out OK, within the parameters of directive 137, got his gun back, and been on his way.
Pushing the envelope, with an IGNORANT cop pointing his gun at you, is NOT the way to go.