Why You Can Spot Bad Green Screen

When motion pictures started using chroma-key effects, they were believable because we weren't used to them. In the decades since, we've gotten much pickier about special effects- we expect all movies, TV shows, and even videos to be as good as the best we've seen. You can catch an old movie you loved as kid and be shocked now at how awful the special effects were. And now that everyone is making their own video content, the quality of green screen shots varies widely. Tom Scott explains exactly why. The video is only 4:30 long; the rest is promotion.