How to connect a camera module to Arduino nano?

First you need to determine what kind of camera. You can do it on the CPU.
To understand what the bus and the Protocol data is transmitted
But you have to understand that the performance of the 8-bit Arduino will not be enough to produce a colored high-quality video.
Start with this

Most likely these tools (Arduino + analog camcorder) are not suitable for the solution of Your problem. I suggest you look on the other side. What You want to Output, and under what conditions. In one word describe more fully Your enquiry.