"Flirting" with women working low-level service jobs is a stupid idea. They're in a situation in which they're required to A) be friendly in the most superficial way possible and B) provide fast service.
The problem isn't the women or their personalities - it's the highly rationalized modern work environment.
Also - and you can't watch the video without noticing it - this guy's approach sucks. He's poorly groomed and has no charisma.
EDIT: At 3:00 this dope goes from mostly pathetic to entirely creepy.
This.
Given how many olds (see overly egotistical impatient rude assholes) eat at fastfood places.