Hi, ltoglia!
Thanks for using the Apple Support Communities. After reading your post, I see you're trying to put together a movie using iMovie, and have questions regarding adding video clips to it. I know how fun it can be to create a movie, especially as a going away gift, and want to help!
Give the article below a look; it will provide you with steps on how to add video, audio, and photo clips to your iMovie project. You can add as many as you'd like.
iMovie for Mac: Add clips
Happy creating!