system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the video editing greenscreen... green?

Why is it green and not red or blue or anything else?
gpt
You need a bright primary color, one that most people aren't going to wear or have on their bodies, because all of that color will be deleted when you edit the film. You can use blue, but green is less likely to cause problems with people's eyes or fashion. 

Red is worst, because it can cause problems with erasing some people's skin tones at times.