Found this on reddit:

Let's dissect what we see here. First seconds the video poster points out a police station everyone is by peacefully and calmly protesting a recent cop who murdered someone but hasn't been charged with murder, he then turns around in surprise as he hears glass breaking in full view of the police station. He doesn't seem engaged with the protests at all, and as soon as the windows are smashed he doesn't loot at all and proceeds to calmly walk in a direction that quickly breaks line of site with anyone who might have witnessed him like he had a planned exit. He wore a mask and is wearing an umbrella. Both these help hide his identity to civilians. Wearing a umbrella when it isn't raining makes it incredibly easy to track his movements from the police helicopter that literally is heard overhead seconds before he starts smashing. [This was probably done as a safety protocol, just in case the peaceful protestors got angry, so the helicopters could track his movements, but the only violent one was the officier.]

Based on his behavior his only goal seems to quickly commit a crime in view of the police precinct and then leave the area while staying as visible as possible to police. I've broken minor laws before in my life, and my goal is always to stay as far away from police as possible, while this guy calmly does it in front a police station and then when a police helicopter is ahead hold a black umbrella during a sunny day to easily stand out from everyone else in the crowd to the helicopter. Literally all he actions scream that he isn't afraid of legal repercussions or emotionally engaged in the protest/moment at all, when people start smashing windows they either get caught up in the adrenaline of the moment and escalate it or they start looting, this man just calmly walks in a best possible direction to quickly leave the scene like he planned his exit. Foresight, calm demeanor, and planning aren't hallmarks to any riot I've ever known. I hypothesize that this man 100% was only smashing the windows to give the cops the legal power to disperse the protest using force/discredit the point the peaceful protesters were making, and he maximized his visibility to the helicopter because he was the only reason the helicopter was there. He didn't act until the moment the helicopter was audible because the helicopter was providing over-watch for him, if street justice was dished out or things escalated before he could safely extract they'd probably call in a squad car just around the corner to "arrest the bad window smasher man" (protect him). Also nobody commits insurance fraud by breaking a few windows, if he owned the business and was trying to scam the insurance company he could just set it on fire for a way bigger payout.

Stolen from another thread and I can't think of a better way to word it myself.