This happened just after Tunisia won a match during the African Cup Of Nations. The authorities and the police had the situation under control until I ran into a Street Crime Unit that was beating people up to the ground. They noticed the camera on my helmet and decided to target me in order to destroy it.
Never generalise: there is good, as well as bad, everywhere!
Regarding the policemen in the video, I finally decided to file a complaint to the policy disciplinary body in France with good advice from a lawyer.