If you would like to reverse a video on a Mac, it is SUPER easy! Here is how to do it in 6 steps with pictures.
1.) Open iMovie, and click “Create” and then click “Movie”.
2.) Click “Import” and select the video that you would like to use.
3.) Click the selected video from that top and drag it down to the bottom.
4.) Left click on the video, and select “Show Speed Editor”.
5.) Double-click that little dot on the top-right corner of the video.
6.) Click “Reverse” and you are done. You have reversed the video!