I cant download a video from JW Player

[anmids]

Hi! I'm interested in the video of this site

http://www.cervantestv.es/documentales/video_documental_deseo_realidad.htm

Actually I'd love to download the iHD version. I would add the link to the HD version but if you click on it without visiting this site first the video wont load. So, to see the video in HD you must click in the link above and then click iHD. I've tried many programs: Video Helper download, URL Snooper, Ask & Record Toolbar, Orbit Downloader... but nothing works. The link is not in the source code either. I donno what to do

Any help?

Thanks!