Not sure if they've been mentioned but some of the UK streaming sites like BBC iPlayer, ITV Player etc
dizziepanda
In case you hadn't discovered it, both BBC iPlayer and ITV Hub already work from the non-DRM Youtube Downloader part of the product, though you do have to download episodes by individual URLs,
Sadly the other free to air UK channels such as All-4, My Five and UK Play TV either simply do not work with the YouTube downloader, or say site not supported. It would be nice if they could be added to either the YouTube Downloader or DRM part. That would bring most of the UK free to air TV out of the dark ages of recording and transferring to disk :-)