Here's what it does:
This mod adds "Cursed Camera" research underneath "Optics". Once researched, craft your choice of 1, 2 or 4 cameras in the "unsorted" section of the inventory crafting menu. Once crafted, open the item on your toolbelt. Then stand somewhere important, and press the pencil/edit button. This adds a view of area where you are standing. If you selected 2/4 cameras, you'll have 2/4 pencil/edit buttons to use to add views of other areas. Then, later on, wherever you are on the map, simply open the camera item from your toolbar/inventory, and a 'live feed', like a surveillence camera, comes up, showing you the view you had captured earlier.
It's literally like buying a CCTV system, installing the cameras, then viewing a live feed of those cameras anywhere in the world. Great for keeping an eye on defences, power, whatever.