Here is a description of the video: A large group of protesters are gathered in front of a building, some with their arms linked. Several protesters hold flags and signs with various symbols and words. Some signs appear to be specific to the University of Campinas (UNICAMP), indicated by the "UNIC" symbol on one flag. The protesters are facing a line of individuals wearing helmets and protective gear. The setting appears to be an urban area, with multiple buildings visible in the background. The sky is overcast. The protesters are marching through the street, their flags and signs moving with them. The setting continues to be an urban environment, evidenced by the presence of city buildings, traffic lights, and street signs.