How to convert YouTube video to MP4, MP3?

With YouTube, you can visit it every day for fun, news, videos or whatever. Chances are that you sometimes want to convert the YouTube videos to MP4 files for your multimedia devices, like iPod, iPhone or PSP, so that you can watch it on the move.

This guide aims to telling you how to free download YouTube video and convert YouTube to MP4 for your iPod, iPhone, PSP or other MP4/MP3 players.

Include two parts:

Part 1 : How to free download YouTube video?
Part 2 : How to converter YouTube video to MP4/MP3 for your MP4/MP3 player?