The local police in my area have a system for people to share videos. According to local news it is a request only type system where the police request it and the individual has a choice to share or not. The local police really hammered that request point home, I assume they're somewhat aware that people will not participate if they don't get to make the choice themselves.

Oh good, we’ve automated manhunts where the populace works themselves into a frenzy. Don’t even need the news involved anymore