How to edit 'iTunes Movie' to be visible on iPhone's iMovie
Yes. You will need to use iTunes to sync the intro video over to your iPhone.


Connect your iPhone to iTunes and select it.
Click the "Apps" tab, and scroll down to "File Sharing".
Select iMovie from the list.
Select "Add..." from the lower right corner.
Browse your documents to find the intro video and open it.
Sync it over to your iPhone.
iMovie should recognize is as soon as the sync is completed and you should be able to use it normally.