Press Release that came with the above video.

BURIED TAPE REVEALS USE OF FORCE AND AN UNWARRANTED MASS ARREST OF BYSTANDERS DURING THE REPUBLICAN NATIONAL CONVENTION ST. PAUL, Minnesota (September 18, 2008)

Video released today shows the indiscriminate arrest of a crowd of two hundred at the waterfront across from a concert on Harriet Island Regional Park during this month's Republican National Convention in St. Paul. The video includes multiple angles of the event as well as an interview with the cameraman who buried his footage and was one of almost two hundred people arrested for rioting without probable cause.More than eight hundred people were arrested in St. Paul during the Republican National Convention. This video shows that at least twenty percent of the eight hundred plus arrested were seized without due cause.

Source here.