If it plays in quicktime, you can play it in itunes. If your video file is not in one of those three formats, you'll have to convert it.
[header] How to add movies from your computer to itunes [title] Make sure the file is in an accepted format. [step] Itunes will play videos that are in the following three formats :. Mov ,. Mv4, and. Mp4. [substeps] A good test for whether your video will play in itunes is to try opening it in quicktime, if you have it.