Don’t miss the ending when the tire is deflated.
Wow, that is some really “wet” air. He needs an air/water separator for his compressor, and possibly an air dryer to catch any residual moisture that makes it past the separator.
The up-selling of filing tires with nitrogen has nothing to do with nitrogen itself, but the removal of moisture from the air (which is 79% nitrogen to begin with) is an added plus in of itself. This becomes important when temperatures get below freezing, and the water decides to phase change.
Personally, I use SCUBA air as it is meticulously cleaned of moisture and contaminants.