Go through the timeline of your open project until you find the clip you want to cut and click on it.How Do You Trim a Video in iMovie on Mac? However, if you’re still set on modifying the length of the video, you should try to slow down your clip in iMovie. If you are trying to make the clip shorter than it is, but it seems like it’s not working, it’s possible the clip is exactly 0.3 seconds long, which is the shortest duration iMovie will allow. That’s because there is no more footage at the beginning or the end of that clip. You won’t be able to drag the clip’s edges. If you’ve added a 10 second video clip, you won’t be able to make it any longer. To make the clip longer than it is, drag its edge (from the beginning or end, depending on your preference) away from the clip’s center.

To shorten the video, drag its edge (from the beginning or end, depending on your preference) towards the clip’s center.

Drag the edge of the video closer to or further from the center to adjust its duration.

Use the pinch-and-open gesture in the middle of the timeline to achieve this.

This will make it simpler and quicker to edit.

If you zoom in, you’ll be able to see more of the clip’s details.

Open your project in iMovie then tap the video clip or photo in the timeline in order to display the yellow highlight that allows you to trim the selection.Here’s how to adjust your clip lengths in iMovie on your iPhone or iPad.

Video trimmer for mac