From the looks of the pic and video two different things are going on. In the video, the camera is pointed at his property, and it just happens to cover part of the neighbors property. It would be impossible to aim a camera down your property line, and it not cover part of the other person's property. I do have some experience with cameras. It's kinda hard, if not impossible, to point a camera at anything where it's not going to cover part of other people's property. Unless you buy every acre as far as your eye can see and mount the camera in the middle of that area. The camera in the first pic posted by the OP is different. It, from appearances, is intentionally aimed in a direction to record OP's property and only OP's property. It's hard to be 100% certain in either case unless you're on site and can see things first hand.
I would add that I thought these hillbilly Okies around here could be some nosy ass busy bodies. You New Yorkers got em beat.