I was going to agree with you, but I've just double-checked, and you CAN access video content on the BBC sites on a desktop (MacOS X Safari) by setting your User-Agent to iPad. However, it's important that you've removed Flash completely from your system (using Flash Uninstaller), rather than just disable Flash (hoping to use Click-To-Flash). For some reason, they detect Flash by some kind of file-path-detection code...