

You can import any iMovie project or QuickTime-compatible video file from the Media Browser and add it to a track in your GarageBand project.Garageband automatically separates it into a video and audio track, the audio being directly below the video footage Drag your video footage from the bottom right box into the very top track.Make sure Movies is selected in the top right Media Browser section.Select the size you want to work with, you can see which size works with which applications, bearing in mind that you may want to upload to YouTube or WordPress select Medium.

In the Share menu in iMovie select Export Movie.
