557256 Youtube to mp3 script

Hello, I want a script to do the same as keepvid, with a url from youtube, (xtube, pornotube, youporn, redtube optional) can download the mp3 audio, or video in flv, mp4 or avi. the script has to run on any Linux server, have a mysql database where you save the url of the videos already converted to mp3 (not having to convert them), a cron job to delete the videos of 'x' days back, encryption hash of the URL to download the video or mp3, a count of the percent complete video download. the script should use php and jquery effects sorryfor my bad English