For CCTV system that are solely relying on Cloud Platform, there’s no other way for users to mitigate various security issues that’s inherent with every network connected devices.
You are not able to limit access vie firewall settings, vpn configuration, whitelist/blacklist of geographical locality for access, etc.
The security vendor controls the whole platform and your system is only as secure as how the vendor managed it.
Even Tesla’s facility is vulnerable when they rely solely on cloud platform systems.
Verkada surveillance cameras at Tesla, hundreds more businesses breached -hackers