ELI5- why do screens/lights flicker in videos taken by phone or even yt vids, but not in movies and professional productions?

Question

ELI5- why do screens/lights flicker in videos taken by phone or even yt vids, but not in movies and professional productions?

In: 674

Answer 1

Moving pictures on an old TV are basically a series of still images strung together (like an updated version of flip cards) The movie camera is taking a series of still images and stringing them together. If the camera and the screen are not working together, you get flickers.