It might also mean the clip is at the shortest length allowed by iMovie, which is 0.3 seconds. If you still want to change the duration of a clip, try changing the speed of the clip.

If you can't drag the edge of the clip, there might not be additional video at the beginning or end of that clip. For example, if you added a video clip that’s 20 seconds long, you can’t make it longer than 20 seconds. To make the clip shorter, drag the edge of the clip toward the center of the clip.To make the clip longer, drag the edge of the clip away from the center of the clip.Drag the beginning or end of the clip to make the clip shorter or longer:.When you zoom in, you can see more detail in the clip, which can make it easier to edit. To zoom in on the clip, pinch open in the center of the timeline.A yellow highlight appears around the selected clip. With your project open, tap the video clip or photo in the timeline.You can trim a video clip or a photo so it appears for a shorter or longer period of time in your project.

Reverse clip imovie iphone