You seem to have misunderstood an is/ought distinction. You may hold the (fairly extreme, as far as copyright goes) position that surveillance footage should be subject to copyright, but it's well established that it's not. Who owns the camera is irrelevant. At least in the US; I'm not aware of any jurisdictions that hold otherwise. This is why Wikipedia articles on world events in the past few decades are full of stills from surveillance cameras: it's one of the few sources of imagery of an event that are unambiguously legal to include, because unlike a photo or intentionally made video of something specific, it's not a creative work. It's also pretty firmly established that human authorship is required for something to be subject to copyright, and having an idea that lead to some particular expression is itself not sufficient; see, e.g.: https://en.wikipedia.org/wiki/Monkey_selfie_copyright_disput...
(Not a lawyer, just a Wikipedia editor.)