How to download & convert youtube Videos to ipod/mp3/dvd/avi/wmv, etc

Firefox Add-On: Download YouTube Videos as MP4

An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a simple interface and it downloads videos directly from YouTube. The extension integrates with YouTube's interface and adds a download button below the player.

Download YouTube Videos using Python

Get flv
RealPlayer

Online Convert
Clip Converter
Convert YouTube to mp3
You Convert It

Offline Convert
Prism Video Converter Software
SUPER (Simplified Universal Player Encoder & Renderer)

How to Download Videos Using VLC Media Player

Tired of reaching for your volume knob every time your mp3 player changes to a new song? MP3Gain analyzes and adjusts mp3 files so that they have the same volume.