Pit bulls: Dangerous or not?

I saw a pitbull video that was extremly violent and so I asked myself are they really that dangerous? I checked a lot of pitbull videos and they were not all violent. Pit bulls have been known as a dangerous strain of dogs. Are they really that dangerous or not? Everyone has their own view but the fact is that pit bulls are not human aggressiveand that they are blue and loving dogs. Pit bulls score an 83.