Storage problem

It requires so much storage. Seriously. So. Much. And now that I have deleted nearly all my photos and all of my apps, I can finally download this stupid thing. But only to realize that I need eVEN MORE storage just to make a movie. And I have no other way to clear storage specifically because I HAVE PLENTY OF STORAGE and this app really gets on my nerves. Very unsatisfied.

Rockmanofag3s about iMovie, v2.2.3