There’s plenty of video of everything. There’s video police calmly pinning George Floyd down and slowly murdering him, even taking his pulse to make sure that he was in fact dying and they didn’t need to adjust their hold to make it more lethal. There’s also plenty of video of police riding around and tear gassing calm crowds, as well as them standing next to vandalism and suggesting tags to spray. There’s also plenty of video of them attacking journalists, who I’m sure spent hours antagonizing them into assaulting and maiming them. Given that the unrest is hitting the places with the worst police/community relations (Philadelphia has been affected while across the bridge in Camden is perfectly calm), it’s pretty obvious that police are actively trying to discredit the protesters demanding reforms to their occupation, usually by trying to bait them into violence and then refusing to enforce laws to maximize appearance of lawlessness. Hell, they even openly acknowledge it - one officer said that Floyd’s blood was in the hands of protestors who came out after his death.