The world’s smallest movie is called “A boy and its atom”. It is the smallest because IBM used the atoms for this film. They have the Guiness world record for this.
The technique used to capture the film is called stop motion. In a stop motion film you simply move the objects and take photos and combine them into a film. So they simply moved atoms for every frame and took photo we can say. Check the smallest movie below and see how IBM made it possible to create a film using atoms. The things you see in the video is 100 million times magnified.
It has even listed at the famous film review website IMDb and got 6.8 points for now. You may have some extra photos from film “crew” there.