Revision3, a great site for videos on various topics (Diggnation is one of those), offers different RSS 2.0 feed links for different video-formats? Is that good?
AFAIK, Media RSS specification allows you to group all (seen in above picture even Bittorrent feeds) that in one feed and RSS feed readers can show/download the content they are capable of playing/rendering?
Update: I have sent couple of emails to Revision3, requesting them to implement Media RSS for feeds. I have not heard from them, so I posted here on my blog 🙂