British streamer in public place told to stop filming

The law isn't what interests me here. To my knowledge, this is a public place and legally he is allowed to show faces of passerby or audiences - if they then ask not to have their faces shown, that's a different deal (although I still don't think it is illegal, it is impolite). In Asia, faces are blurred unless express permission is given - I do not know if this is law or culture. They approach him immediately after he approached them, asking if they wanted to come over - at that point, they feared they were being shown and demanded that the camera not show their faces.

The subsequent argument doesn't interest me either - the pianist is being an asshole instead of politely nodding and de-escalating the matter, and the tourists are losing their cool (any time somebody is screaming the same few words over and over, they have completely lost legitimacy and they know it, which leads to them getting angrier).

It is the cops that interest me. When the woman takes the pianist aside, she wants him to stop filming because she doesn't want to be on Youtube - which is 100% NOT what to do in this situation! She is there in a public capacity, and if a camera is there she must stay very, very calm and smile for it. He refuses and she gets flustered and instead of calmly explaining the allegation being made against him and calmly explaining that his "racist" comments only incite arguments and escalate things until the cops are called.

I had to deal with this situation last year when a man I worked with on a one day gig (good guy, I liked him) got in trouble for assaulting someone on the job. He explained to me what happened, and I tried to explain that there were many avenues he could have gone before shoving a man over, and I explained to him that video evidence would vindicate him if he was in the right. He was angry and upset, but calmer after I finished talking to him. I'm pretty sure he got charged by the victim later and got his license suspended (my mother was coordinating the event and had to yank him away after the incident, and she was told to supply FULL DETAILS a few days later by a disciplinary committee). The point is that I was trying to de-escalate an argument between two parties who were very heated, and telling him that he can't do something straight off wouldn't have helped him calm down. I listened to his full story and asked him to think through different things he could have done that wouldn't result in him being removed from his position.

This cop, on the other hand, immediately began accusing him without getting all the facts and wanted him to take the camera off of her. That turned her into his enemy, and he responded as such.