Everything lives in safes and those safes are covered by cameras, if you try to drill the safes you'll be found (or heard) a long time before you manage to break in
Unless someone figures out how to compromise the cameras and microphones. (Maybe I've watched too many Hollywood heist movies?)
I believe there is multiple redundancy both in cameras being in multiple places and also delivery mechanisms (local copy + remote stream etc). I'm inclined to believe that there are more mitigations that haven't been told in the post, which is plausible.
Hacking the closed-circuit cameras probably only works in a James Bond movie, since all you have to do is keep that circuit air-gapped to prevent it. I imagine that physical access to the cameras' control system is also guarded.