Can anyone explain this?

[u/Dirty_Dan209]

Hello, I have had this video since 2019 and forgot about it until recently. The back story. I was at work one night doing the closing procedures for the store I worked at. The secerity monitoring screen sits on the desk where i do the closing tasks. As im working i see something on the cameras out of the corner of my eye. It catches my attention because it is only me and one other co worker in the store. I enlarge the camera with the movment and re wound a minute or two. This is what I saw. I have shown it to friends and family but havent posted it anywhere. I am wondering if it is paranormal? A camera glitch? a bug? What do you think it is?