Amazing what technology allows.
The person responsible for the improved version of the film is Denis Shiryaev. This used two publicly available programs based on artificial intelligence algorithms to replace the original material the Lumière brothers in the movie that plays in 4K, in 60 frames per second. The result is unbelievable!
The first of the programs used, Gigapixel AI, uses an interpolation algorithm that analyzes the image, recognizing its details and structure, and then "completes" it. Second program, Dain, "Imagines" what additional frames would look like if placed between the frames of the original movie and then inserts them into the material. Thanks to this, the image in the Lumière brothers' movie became smoother, and YouTube users can watch it in 60 frames per second.
I've put both the original and the new version of the film below, so you can easily compare them. Although the work of Denis Shiryaev does not look like the film originally shot in 4K (there are many imperfections on the screen), in my opinion the difference between the two materials is staggering.
Interestingly, soon after appearing on YouTube "Train arrival at the La Ciotat station" in 4K, this new version of the movie has been further improved, using artificial intelligence to color the black and white shots – DeOldify. In this case, the effect is not that amazing, but it's still worth watching.
The artificial intelligence algorithms currently allow is amazing. I really don't want to know what these will be capable of in the future.