326546 MP3 search engine

I need a mp3 search engine using youtube API. The script could be like [login to view URL] or [login to view URL], using AJAX and PHP/MySQL for playlist, etc. The script could have a script to "extract" the audio of the video (like [login to view URL]), or perhaps, it can uses an unofficial API from VIDTOMP3.COM. Only one requirement: The code should be commented (for editions). I don´t speak English very well, i´m Spanish, sorry. For more information, please contact me in my email. Godd bye ;-)