Good, such records shouldn't be exempt. So what if they were gathered by a third party, it was a service carried out under request of the local government/law enforcement, and paid for by public money.
Such records shouldn't exist in the first place. I agree they shouldn't be exempt if they do, but let's not just accept that it's okay to have a fleet of cameras recording us 24/7 everywhere we go, managed by a private entity, accessed freely and without any probable cause by local and federal agencies who don't even communicate with each other.