I was working for simplepie based youtube Rss Feed reader for a few days.
and this is my outcome.
you can check the code base as well as provide valuable feedback if you like it.
for those who don't know what this is all about
SimplePie: Super-fast, easy-to-use, RSS and Atom feed parsing in PHP. is one of the leading rss feed parser and this plugin of simplepie helps in providing more info about youtube video's
Please check and suggest if you find any discrepancy in it.
simplepie-youtube-addon - Project Hosting on Google Code