Slow motion videos are one of the fun aspects of using your iPhone for videogprahy. You can record videos in 120 or 240 frames per second and then watch it play back in a much slower manner than it typically would.
On the other hand, if you don't use your iPhone to capture video, getting the video files from your other devices to transform into slow motion is a little trickier. Fortunately, iMovie for Mac can convert your videos into slow motion, and in this tutorial, we'll show you how.