Mysterious orbs set off security cameras

A woman I work with showed me this clip from her security camera. Nobody can seem to explain what it could be. If you watch to the end, you'll see a white cord move up the right side of the screen. She has no idea what that is either.

This was her back porch camera, and she says that there are no windows under that camera. Whatever it is was probing the cameras specifically.

I tend to think its some sort of insect with 4 wings, but it moves more like a drone. Even then, both incects and drones have bodies, and we can't see a body in this footage.