I have set up various CCTV around the map.
It works fine the first time it is added
Come back 24 hours later and it is just static on the screen, offline camera
Removing the ID and re-adding it to the computer station makes it display again
Any way to force it to always stay online?  Thanks!

This happens because the CCTV was killed and respawned, while the computer station persisted. It's a Rust bug, where the computer station can only access the bookmarked entities if they have the same IDs as when they were added to the computer station. Facepunch has already fixed this on the upcoming rc_drone branch, but that's not yet merged/released.

Options to resolve:

• Install the RC Identifier fix plugin
• Set PersistEntitiesAfterUnload to true in the Monument Addons config