The crowd gets involved at about the 0:55 mark and it just continues from there. The police start to back out of danger at around the 12 minute mark.  I honestly feel bad for the police here. They are being thrown into a situation that is very emotionally charged, and they are outnumbered by a lot. No good can come of it.

The government is over a barrel here. If there aren’t enough police to put a lid on this, they might as well give up and let the public go about its way. It is ultimately true that just about every government serves at the pleasure of the people. If enough of the people don’t want the government around anymore, they will just ignore you at the least, or forcibly remove you at the worst.

Here is the video:

https://www.liveleak.com/view?t=sttE7_1619357225