youtube website won't open.

Hello,

I'm using macbook pro osx 10.8.2. all software updated. flash player uninstalled and re installed (50 times). I have another macbook air and iphone here using the same wifi where youtube works just fine. same exact problem with ethernet too.

To be clear, all websites are working fine Except youtube and 'youtube' videos on other sites (facebook) won't play. vimeo opens and plays just fine. Here's the rub, the network internet settings on both macbooks are identical.

I've tried extensions and 32bit and even running a tracerout. . . . it just keeps going.

Any help would be appreciated.