Nowadays, anyone with some probably-pirated software and a big, solid-colored cloth can do video compositing, magically transporting themselves out of the basement where they've hung their mom's new green sheets. Maybe to Delaware! But how did editors and special effects people manage it before we domesticated thinking machines to do it for us? Well, here's the answer in an informative three-and-a-half minutes. Prepare to finally learn everything your local weatherman has been hiding from you for decades.