Why is my Matinee movie file so large?

That is normal because what Matinee outputs is uncompressed. You’ll need to convert the output avi file into another format in a video editing software.

When I use the “Create movie options” with Matinee, my 1-minute-long animation gets exported into an avi of 13 gigabytes. So far I haven’t found a way to reduce it (not so many options in the Movie feature).
What can I do to fix this?