The problem with this video is that the police did not lose a thing.
The police didn't act probably because they thought that it was not worth the trouble to try to arrest a big, trained and obviously upset man that
was only shouting, but the end result was that everything was the same as it was before.
Yes, some thousands of people may see this video, but what will it change? Are they going to act any different because of what we can see on the video
or are they just say "good for him" and move along?
And even if it's true that the police should not hurt unarmed civilians, the unarmed civilians should also cooperate with the authorities, if they
want to keep a demonstration peaceful and according to the law.
As for police brutality, that's nothing special, just the result of too many people on a relatively small space, with nobody to organize their
movements or their distribution on that area. At least it's what it looks like to me.