. Later what they did was that they traced the IP of the uploader...and got the guy. In Pakistan you can bribe the ISP's to get number of the service user . Its serious caz most people are on dialup.
i would be surprised if that can be done without ip information at first and i dont think you tube shows that.
finding a particular instance from 100s of isp is really hard..
can you tell what did they do to that guy.