The footage was shot at a free Tibet peaceful assembly in New York on the 14th of March.
It shows the protestors holding flags and signs and peacefully walking down the street towards the UN building in the Turtle Bay neighborhood only to be accosted by police officers with batons.
One officer identified as "Delgado" is seen in the video pushing people as the group crosses the street.
Another officer, identified as "Serano" is caught threatening to kill two protesters as the cameraman passes. He later admits to the threat and apologizes for it.
As the group nears the UN building, cop cars and vans screech onto the sidewalks, cops pour out and begin to beat the protesters with clubs as UN security guards observe without becoming involved.
A non uniformed officer, who seems to be directing the entire operation, then orders the cameraman to step back and move away.
"Look at these cops, clubbing people in front of the UN, unbelievable, protesting to free Tibet, cops clubbing people in their legs on the sidewalk, in front of the UN in America, unbelievable, this is not China." the American cameraman announces in disbelief.
Check out the (rather disturbing) video.