First What's and Why's
What is editing?
When editing a video program, you organize all the visual and sound elements you've recorded or gathered into a coherent narrative that unfolds in time. Whether you're creating a 30 second clip for the web or a full-blown documentary for your local cable access channel, the objective is basically the same: to forge a video program that communicates your message to the intended audience: your story, or your students's stories about what was experienced, discovered or learned; stories to share with fellow-professionals, fellow-students and the community.
Say you're videotaping a baseball game for use in a 8th grade class in physical science. You might shoot the entire game, start to finish, but chances are that unless the action is compelling throughout, you'll end up with a rather boring video.
What if you choose to shoot just the high points from different viewpoints? A wide-shot to establish the scene; a close up on the pitcher; a long shot of the ball arching over the field; a medium-shot of the catcher; a close-up of the scoreboard changing, and then the crowd cheering. After which you move to the lockers and tape a short interview with one player from each team, then the coaches for their reactions to the game.
Or say you're videotaping a demonstration in the laboratory or field. You want to capture a procedure that take a few minutes to unfold in "realtime," then condense the footage into a short movie lasting 30 seconds showing only the key steps. Below is a simple example of an edited movie show the key steps in launching a weather balloon.