I found some library to deal with the youtube API but all of them use a remoting service like amfphp.
I didn't want to use a remoting service. I just needed a simple way to retrieve video feeds.
So I create a library wich use the JSON-C format. (http://code.google.com/intl/en/apis/youtube/2.0/developers_guide_jsonc.html).
This allows you to quickly retrieved search results and information about each video using only actionscript.
How To ?
I will add support for more API query's propeties later so stay tuned ! follow me on twitter : dipigraph