iMovie You can send your finished movie directly to iDVD and then create a professional-quality DVD featuring your movie.
To send your movie to iDVD:
In iMovie, open a project or select it in the Project Library, and then choose Share > iDVD.
The Share menu appears in a light gray bar across the top of your computer screen.
Your movie is rendered and sent to iDVD.
iDVD opens with your movie in a new iDVD project. You can modify the project just as you would any other iDVD project, by changing the DVD theme, editing the menus, adding more movies, adding photo slideshows, and so on. Or, you can simply burn your movie to a DVD immediately.
If you want to add your movie to an iDVD project already in progress, first send it to the Media Browser and select the largest movie size available. iMovie renders your project and then makes it available to all Apple applications that access the Media Browser, including iDVD, iWeb, and GarageBand. Then you can add the movie to an existing project from within iDVD.
To learn more about iDVD, open iDVD and then choose Help > iDVD Help.