Here is a primer on that:
https://news.artnet.com/art-world/a-brief-history-of-animate...
> Unlike GIFs, video files don't actually contain every frame of animation you see
> As a GIF, it takes up more than 60 MB because every single frame needs to be stored as a complete image.
This is ridiculous. See http://www.drdobbs.com/optimizing-gif-animations/184412988
Here is a primer on that:
https://news.artnet.com/art-world/a-brief-history-of-animate...