Genjosanzo : yes we did, we just don't have time : / we are trying to come up with solutions for that, and we are actually accepting suggestion / patches from developers (code is open, testing is ready and so on ) but time is a constraint.

We don't use the main youtube api but the support is indeed easy to implement. It just needs time.

So I think is cool and useful, but we don't have time to do it

Focus now is to try to make it as best as possible (so actualy we are trying to see how to improve mplayer) and fix small bugs.

Marcelo