[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. 
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.