How do you change itunes video into mp3's for an earlier generation Ipod?

You need to go into your iTunes Preferences and go to your ADVANCED tab

Under "Import Using" And you can choose the MP3 encoder. Go to whatever video you want and right-click it, And there should be a preference called "Convert to MP3"

Just be sure it's not a PROTECTED file. iTunes refuses to convert anything that is protected.

Don't worry about losing the original file, iTunes will NOT overwrite the original file in your new MP3 form.