One of the comments below the vid is a guy who apparently knows some more about the situation. He said the guy with the handgun prior to the cops showing up was sitting in a lawn chair in the store showing off his gun for some social media site. So, it sounds like he was trying to provoke some sort of response and brought undue attention to himself—once again making things worse for responsible owners.
It's called a PROTEST.
There are THOUSANDS of Hong Kong-ers "calling undue attention to themselves" by flying American Flags and banners that say "Make Hong Kong Great Again".
They are "making it worse" for all law-abiding sheeple in Hong Kong!
But when seven cops show up and treat Constitutional carry like a crime, then lecture the "violator" with absurd rhetoric, then tell you to sign a yellow-dog contract, under implied threat of arrest, well.... they're just doing their job! Just like the Communist Chicoms are doing in Hong Kong. Got it!! Let's not rock the boat! We might lose social points....
Come to think of it, there are many sheeple here at FR.