That's not a paper, later on the video you can see a paper falling on the ground and it doesn't look alike. It's pretty obvious that it's a rat. A shadow doesn't crawl lol, and in that kind of light it wouldn't be dark shadow if it was the case.

Yeah thats a Rat

That was not a damn piece of paper scurrying across the floor like that. Plus the object was dark.

I can't.