Safari / Astro Van Door Handle Replacement - Without Removing the Door Panel - Let's Figure This Out

I replaced the driver's side door handle last year and did it the traditional way in which you pull the door panel off.

This time I wanted to try something different. I saw a video by Jerry Williams where he claims to be able to change the door handle in under 13 minutes. Well, he did.

Here is the link to the video: https://www.youtube.com/watch?v=XKTjbh82L3k&t=196s