Importing Your Movie
While you can’t create your own templates in iMovie, the program does offer you a number of templates, which can tweak based on your own preferences. Before you can start making a trailer, however, you need to first import your movie into iMovie.
To import a movie, follow these instructions:
1. Go to File.
2. Then, select the import feature that you need to use. If your movie is on your hard drive, just select Import. If it is on your camera, select Import from Camera.
3. After you select import, then iMovie will start importing your movie. Depending on the size of your movie, this could take several minutes.
4. Now, you must open up your movie. Go into the Event Library, and select your movie.
5. Go to File and then New Project to start making your trailer. Give your project a name, and then pick the frame rate and aspect ratio that you want to use.
6. Select OK.
Now, you can start making your trailer.