Bravo
I had a dealer threaten that it would void my warranty if I did not have them put nitrogen in my tires. I told him that if it made him feel better he could do it for free. He did. As soon as I got home I took the stupid looking green valve stem caps off and put proper black ones back on. Putting pure nitrogen in your tires will never hurt anything, but it will not help anything either.
One big point that most seem to miss including in the vid above. is that the tire is already filled with air BEFORE you start to add nitrogen to the tire. NO ONE pulls a vacuum on the tire to remove the air before adding nitrogen. So there will still be Oxygen and all of the other gasses in there.
But to be honest, there are a very few very specialized places where nitrogen in a tire does help, but they are very few and passenger car tires are not one of them.