This air conditioner modification is very interesting. I think the modification could have been done neater. That's just me. The guy in the video takes off on a tangent for a short time but gets back on task. It would be interesting to see if there was a big change in cooling temperature inside coming out of the unit.
John M
Improve RV Air Conditioner cooling & reduce power use for about (See... (https://youtu.be/aWUqQnEw-8Y)