If you have tried a direct Ethernet cable to the computer, then its sound like a hardware problem with the computer. I assume you have also tried the Google Chrome web browser?
Apart from that, I have no other suggestions, as the site is simply a web page with video, just like the BBC iplayer.
Does the BBC iPlayer site work?
Thanks for this.
I concur, as I can see no other explanation. Subject to the following, I will contact an IT expert to attempt to ascertain what sort of hardware there may be. Now answering your questions:
I tried Chrome and IE and they both have the same issue.
BBC iPlayer functions but comes up with a message 'not sufficient bandwidth' and then buffers. I find this strange as BBC iPlayer plays perfectly well on both my old computer and the Panasonic Smart TV I have: I would have thought if bandwidth was the issue it would show up as a problem on all devices.
Is there a way to check bandwidth or to extend it?
Once again thanks for all your help.