I'd like to ask if it's safe to use a PSU to just power CCTV Cameras and ... use a proper CCTV power supply. I have used at least a dozen of these. 18 outputs, each channel is capable of 2A ...

I came across CCTV systems that Swann offers and inquired about them. With that, Swann was nice enough to send over the NVR-8580 8 Channel system that comes included with four 4K capable cameras.