In one of the document that you can download from this site it's described that the N6600 does not support live streaming from http sites. Only rtp sites. I think you find the document under "Documentation/Device specification/N6600..."
I.e Real networks sites...
Ive tested, and found out that a BIG problem is the speed your network provider allow you to use is to slow for video, so all you get is sound.
This sux