Don’t think it’s crawling on the camera. And would be a weird looking bug, if you pause in the right spot, you’ll see it looks like two separate whatever. I think when the camera had dust over it, and was recording it all night, that dust wasn’t the same brightness or whatever.
So unless a bug can make themselves look like that on IR, I doubt it’s a bug. How would a bug that big get in here? And where would they hide during the day? I suppose it could be close to the camera. That still doesn’t explain how it looks like two things. If two bugs, they wouldn’t be perfectly aligned while flying probably.
I have no idea what it is.
Might be easier to pause in VLC, so download and open in VLC.
Slowed down video: