The road is closed with a non regulatory sign, the vehicles and the the driver are allowed to access the road by law if they have a legitimate reason, the red sign has been deliberately placed in the area which should be open for access, I suspect by the man with the camera. The restriction can only be enforced if a police officer sees a vehicle passing the signage, then the officer would have to warrant that the driver of any of the vehicles didn’t have a legitimate reason for passing the barrier. That the law, remember the Highway Code is not the law, it’s a guide. Unfortunately the man with the camera is attempting to enforce a law which he cannot uphold.
You seem to go out of your way to antagonise people like you want a reaction, this may well one day backfire because some people aren’t phased by a camera, fair enough you do what you do but you seem to further aggravate people in the hope of a reaction then it’s “I’ll call the police” thus taking the police away from real policing for something you brought on your self,your not the police or a traffic warden leave enforcing to the real people cut out for it, also should be a law against filming people without consent if you ask me,
I have watched this several times now and cannot see that this man "attacks" anyone. He raises his voice but that's it. The South African guy completely overreacted imho.
Nothing more boils your piss than following a car at 28mph with a dash cam front and rear, (just a front one is bad enough..) obviously a grade A, superior driver who feels the need to film everybody and post them on the internet.