It happens. Software updates itself and before you know it, you are staring at a whole new screen of different buttons, functions and options. One that stays true to this is iMovie, which recently has been updated, but looks completely different to the old version. However, the functionality is the same, and the same fun-loved effects that were easy to carry out in the old iMovie, can still be done simply on the new version. One of these effects was green screen, and below is a video which shows you step by step how to import, apply the effect and export the movie.