"Pakistan has blocked access to the popular YouTube website because of content deemed offensive to Islam" –

http://news.bbc.co.uk/1/hi/world/south_asia/7261727.stm

The whole world has no access: http://blogoscoped.com/forum/124584.html

And it was actually due to the Pakistan issue:
http://www.hescominsoon.com/archives/846

Somehow they seemingly accidentally hijacked the IP address and screwed up everyone in the process.

As it became a global issue apparently, continued at http://blogoscoped.com/forum/124584.html