I don't have a blog (medium or anything) so unfortunately I don't have a use for this, but I LOVED the gif. It wasn't an attempt to show "how easy it is to do with one command" but rather a real flow of how it all goes, I appreciate it, well done!
Same here. So
1. I downloaded the gif
2. ffmpeg -i screencast.gif foo.mp4
Now watching in vlc at decreased playback speed. (Press `-`)