Two Newbie Questions about NVR (benefits?) and Camera on-board abilities.

I thought I'd try and put two questions into one thread to keep things compact, and also as they are related to each other.
Please for give me if they sound like dumb questions, but I'v wishing to absorb some basic knowledge at the moment



1: All the smart/clever thinks a modern HikVision camera can do. Clever detection of things etc. Is all the built directly into the camera, and the camera does it all itself, or are some of the more clever aspects of perhaps things like types of...

Two Newbie Questions about NVR (benefits?) and Camera on-board abilities.