OK..I'm a tech luddite...but aren't there those low-light cameras...we always see pics on TV with that stuff..
Actually there might be some footage in police car cams. Many police cars and policeman were unfortunately sitting in their parked cars watching logistically important points. Would be interesting to hear replays of the police radio chatter. Might even have a video of a police car in full reverse trying to stay out of the surge wall.