One of the things about security cameras in the dark is the delay frame-rate can cause all kinds of optical illusions. With moths, or other large-winged insects, they can look like they change shape and size as the wings open and close. They can also have the appearance of small faces, because the camera picks up on the darkest parts of their bodies- the thorax and wing-spots. I'm not saying that's what you've got there, but if you hang a fly-paper for a few days you might get your answer.
It could be paranormal, but from that clip, I can't be sure in any way. An Orb generally has its own light source, not just reflecting the IR light from the camera, so you see it with your naked eye, not just on film, but since you weren't in the room, there's no way to know. I don't suppose you want to spend a couple nights sitting up in there with your camera, do you?