How to delete inactive videos?

I have noticed that all videos that have been deleted has gone to inactive video. Why?
The problem is that no way to delete to clean the database from those videos. I would like to ask if there is a query from SQL to do that. Dose someone know :?:

Also the images are stored, they aren't deleted. why :?:

That's weird. Any video that I delete is removed from the server, deleted from the database, and the thumbs are removed.