Since I don’t use iMovie that much, I deleted my “Movies” folder out of my Home folder and the sidebar in Finder. Later, I realized I liked having that folder there. After trying many ideas, one finally worked:
- Add a new folder in Finder by going into the File menu and selecting New Folder. (Skip this step if you already have the Movies folder in your Home folder).
- Drag the Movies folder from your Home folder onto the Finder sidebar.
- This will also work with other folders such as: Documents, Music, and Pictures.