How can you make a movie you made on iMovie repeat?

To make a movie you created in iMovie repeat, you can export the project to a video file and then play it in a media player that supports looping, like VLC or QuickTime. Alternatively, if you're sharing on platforms like YouTube, you can enable the repeat option in the video settings. In iMovie, there isn't a direct feature to loop a project within the app itself, so using an external player is the best option.