The video is disagreeable for 2 reasons:
#1: It fails to recognize the duality of the problem. Attention whores, while a minority in the community, have soured the picture for the entire "gaming girl" demographic. SOME Girls are to fault as well
#2: It's solution fails to recognize the sociology of the internet. Spending time to stand up to a sexist when it's a person you know well is worth it. Standing up to a random person over the internet is a losing battle 99% of the time. It's often better to "not feed the troll" and simply ignore the person.