This is something that caught our attention - a start-up developing purpose-built CCTV drone.
Here is the more information from the company:
Drone surveillance system for alarm verification and deterrence
We did have a chance to watch a demo flight, and it did look impressive. We suggest that our integrators check them out at ISC West. If you would like to get a private demo, please contact me at firstname.lastname@example.org and I will connect you to Aptonomy