Gather your audio and video files. The Capture Video section of the movie tasks menu will allow you to capture and/or import video, and import your audio and photos.
To Capture Video from your Camera: Connect your camera to your computer either through USB, or as directed by the article above. Click this option on the left, and follow the on screen instructions.
To Import Video Clips from your Computer: Choose this option and navigate to the location of your video clips on your computer.
To Import Audio from your Computer: Choose this option and navigate to the location of the audio files on your computer.
To Import Photos from your Computer: Choose this option and navigate to the location of the photos on your computer.
You should import all your files for your movie into the same collection, so that you can keep track of them together.