If all you want to do is to be able to have a cam in place and be able to view the cam from anywhere else, there are a ton of small IP cams available. Most IP cams come with a dns forwarding service as part of the package deal to handle IPs changing. Then use your PC's browser to view the live video, or use a program like Tinycam Monitor to view it from your tablet or smart phone.

This said, I'm not sure you'll be happy with any of the camera offerings that are available to fit totally INSIDE your enclosure. You'd be far better off cutting a smallish hole into it large enough for the lens of the camera to stick through and view everything...