It's fun, now it's working! Anyway, if I find something I'll let you know. Thanks!

Hm. It's already possible. If article contains video it can be played.

Did you encountered cases where youtube video isn't playing? Could you provide a feed address where this happens (you can select feed and send me browser's address bar contents)

No, I mean YouTube API integration, so we can play youtube videos right in the articles.

Youtube provides RSS feeds http://www.youtube.com/t/rss_feeds