I'm not a big fan of these kind of protests. I just feel they are counter productive. I'm also not sure what the guys motive was in filming the whole process & uploading it. Looking for a few minutes of fame?
A couple of decades ago , my old congregation were targeted by a couple of "born again" types who attended meetings every few weeks and would suddenly get up during the meeting & start ranting about how many minutes it was since the name "Jesus" had been mentioned or whatever. Frankly nobody listened to what they said - far less we would go home and do research into their points. We just wanted them kicked out and eventually we had to call the police who had a quiet word with them to tell them to keep away from our Kingdom Hall ( they could do that in those days ).
It was inappropriate and actually a bit disconcerting and for years later it was regularly referenced in answers and comments about "persecution" and how bad Christendom were.
The risk also is that emboldened by their activity and encouraged by the minority of ex-JWs who support this kind of "activism" and become a group of cheerleaders , the guy expands his campaign - much as a Youtuber called "witnessnomore" targeted multiple Kingdom Halls in the North of England last year.