Blackvue cam car "Free cloud Svc" is just a commercial gimmick lah. Its connectivity is via wifi & cloud storage is limited.
See https://www.blackvue.com.sg/over-the-cloud.html
For island-wide autonomous mobile surveillance, they need high QOS mobile network for it to have full live uplink for BWD & eye in the sky realism eg Drones to CCC. So 5G mobile network is key!