Earlier quoted context omitted.
alt here: http://ifile.it/gj1tlk5/video_ours_4x_h264.mp4
Alternate alternate mirror here: http://www.filesonic.com/file/1061063604/video_ours_4x_h264.... had trouble with ifile.it at work)
"You may have reached this page due to a known problem with some UK ISPs" with absolutely no description of what that known problem that they know about actually is. Very bad UI decision there.
I'm pretty sure I can guess what the problem is (the IWF filter, no doubt) but if I were an ISP and got a pile of reports from users simply parrotting that message I'd block the site completely until they improved it. It is like me as a programmer getting "I gots an error message" from a user who then says "oh, I didn't read it all" when I ask what the error message actually was.