Try downloading VLC player and see if that does the trick.
The sound works but there is no picture. The problem arose today after I downloaded some Windows updates. I've had no trouble streaming until today. I installed the latest version of Adobe Flash player before the installation of the updates. Re-installing Flash Player makes no difference. I suppose I could restore the computer to before the updates but they are deemed critical. Videos from the BBC website work perfectly for some reason.
I would welcome any help with this issue.