My first thought was that this is a scam. He is trying to sell us something, or whatever. But in fact, “The Stradman” is just a regular guy who really likes cars, and he wanted to share this money making tip with his subscribers on YouTube.
Basically, figure out which kind of car is popular in your area. Then try to find that car in another city at a cheaper price. There are also differences between rural and city prices for the same car. He’s doing this now and apparently it’s working for him. The video provides a lot of tips on how to make this work.
I think the video is very interesting.
Lamborghini at age 26: How I buy and sell cars for a profit