Video Convertor To iPod Format
The video formats like .avi, .mkv, .wmv, .divx and others cannot be played in the iPod, it only plays Mpeg-4 and H.264 formats, it means you will need to convert these files to play in iPod format.
There are lot of free software to convert it, Videora is one of them, is very popular, and free iPod video convertor and people will like it for the ease of use and it just works. Its compatible with every type of iPod including Touch.