A movie clilp is a cutting/scene/fragment of a movie.
s very simple to make the clip there just import the audio and also pictures or small part of the scenes then mix then up with audio ,here save it and your movie is ready
A movie clip is a single 1-5-minute scene from a given movie. A movie is a collection of scenes that tell a story.
Since have no idea of formats of your movie clips, you can try Video Converter for Mac.
You cannot retrieve clips from a Windows Movie Maker project file unless you have them saved in a collection folder in the program.