IPOD

Take a look at the related questions at the bottom of the page, the answers are there.

Make sure the videos you want to load in your iPod are MP4, M4V formats. Otherwise iPod won’t read them. You can use converter software to convert other formats to MP4, M4V. I prefer to use Aimersoft Video Converter which support various video formats to be converted. You can find some help on its step-by-step guide page:

http://www.aimersoft.com/tutorial/video-converter.html

If your movies are not iPod friendly format, you should convert it to a format that iPod supports first. I think you can use uSeesoft Video to iPod Converter which can help you convert  video formats like AVI, MP4, MPEG, MKV, MPG,WMV, TS, FLV, MOV, etc. to video format supported on iPod, such as converting AVI to MP4, WMV to MP4, WMV to M4V, AVI to MOV, FLV to M4V, etc.

It can be downloaded here: http://www.useesoft.com/products/useesoft-video-to-ipod-converter.exe