I have hikvision, they support local rtsp but you need internet explorer to set them up. I’m not kidding, not mistaking it for Edge, and bought new 2 years ago

Make sure you can afford the elctricity later. 250W constant draw doubled the bill I had before installing my rack. Do the math with kWh per month.

The name cloud comes from depiction of “somewhere on the internet” in network diagrams. I don’t know what corporate environment you’re in but you’re using the term incorrectly.