If I was pulling somebody over I would be ecstatic to know the person had gone through an extensive enough of a background check to get a CCW. It would improve your chance that he's not a hot head or ex-con or general dirt bag. I imagine after a while as a cop you start to realize CCW carries are generally well behaved people. I hope more cops would act as this guy did and be a little appreciative of CCW's.
Can you imagine what the conversation would be like if a passenger filming this in the car pulled over was from Bloomberg's Every Clown and saw this realizing cops actually could trust somebody with a gun and only gave them a warning.