Your cameras keep recording. With a properly installed CCTV system like UniFi Protect, footage is saved to a hard drive inside the recorder on your property - not in the cloud. An internet outage only affects your ability to access cameras remotely from your phone. Once the connection is restored, remote access resumes automatically and all footage recorded during the outage is still there.
This is one of the key advantages of a local recording system over cloud-only cameras like Ring or Arlo. Cloud cameras depend entirely on your internet connection - if the broadband goes down, they stop recording and you lose that footage completely. With a local NVR, the cameras and recorder communicate over their own wired network, independent of your internet.
The PoE (Power over Ethernet) cameras that Doberman installs are wired directly to the recorder with network cable. As long as the recorder and cameras have power, they will continue recording regardless of what your broadband is doing. This also means a burglar cutting your phone line or jamming your Wi-Fi will not stop your cameras from capturing footage.
If you are on the same local network - connected to your home Wi-Fi, for example - you can still view cameras through the app even without internet. You just cannot access them from outside your home until the internet is back.
For sites where power outages are a concern, Doberman can recommend a small UPS (uninterruptible power supply) to keep the recorder running during short power cuts. This is especially useful for businesses or properties in areas with unreliable power.