There are two parts of this video. And probably it should have been split into two parts.
This video is actually sort of really advanced tutorial. Really over-complicating things on how to achieve a simple goal.
How to created an animated gif with a border
I use 3 different applications (OBS, Illustrator and Premiere) and a lot of technical sort of stuff to make this really simple Gif.
Here is the tutorial itself. And here is the file that was mentioned in the video: download file.