If you watch movies or television, you certainly see images that you know were shot in front of a green screen or a blue screen, like the weather forecast and the news channels + plus a lot of movies. But have you ever wondered about the history of this technique and how it was made in the 19th century and how it evolved? I'll let you with some interesting videos about this subject!
And here's a short version about the beginning of green screen before the computer's era.
I also share the trailer of Mary Poppins, from 1964, where the technique of the "sodium vapor process" was used. (Learn more about this technique in the first video of this post, at 10:30).