iTunes 12 won't let me delete a movie

I'm trying to save hard drive space on my school-issued 13" Macbook Air that I'm guessing is a mid-2014 refreshed model. I want to delete a movie in iTunes 12, but when I right click and hit the delete button, it doesn't do anything. I thought that maybe the movie wasn't fully downloaded, so I tried redownloading it to delete it, but it gave me the same movie twice! And I can't delete either of them. Is there any way of deleting these 2 copies off the hard drive, or are they really on in it in the first place?

(The Macbook Air is running iTunes 12 in OS X Mavericks.)