Yes, apparently it takes a crotch cam to capture that exact moment in which a woman checks out a man. (Also: Who the fuck cares? Do guys really want to know this?) The whole premise for this video is to discover where on a man's body a woman looks when she first meets him, as if to say "See! We look at your boobs, and you look at our ____." So they sent a good-looking guy out onto the street pretending to be lost and had him walk up to unsuspecting girls for help. Annoyingly, they caught a few of the girls looking at his biceps and crotch, but when you've got your sleeves rolled up all Danny Zuko-style, can you blame them? And as for the crotch shot, I'm sure the girl was thinking exactly what I think every time some dude stands directly in front of a sitting woman on the subway: put your crotch any closer to my face and I will punch it.
This is why, as a gentleman, I keep my belt buckle f'ing shiny. That way the ladiez will have the added bonus of being able to check themselves in the mirror while they're down there looking.