Learning how to get google videos on your video iPod...is not hard at all... and it's a very easy process.
Google's video service offers a range of clips for you to download and keep http://video.google.co.uk/ (opens in new window). To the right-hand side of movies that can be downloaded is a 'Download' button. To the right of that button there's a drop-down menu where you can decide whether to download it for Mac/Windows, iPod or PSP.
In your case, choose iPod as that's what you want to watch your videos on.
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Once you've downloaded the clip you want, open iTunes and select 'File > Add File to Library' to import the clip. The video will be synced to your iPod the next time you connect it to your Mac or PC.