If there is a bias in our society that is pushing women away from science, then it is absolutely worth our time and effort to attempt to correct that. Why? Because otherwise it seems that we're probably losing out on some *awesome* engineers, who happen to come from the ~50% of the population who are being turned away from their vocation before they've even discovered it. Why would we want fewer great people in our chosen field?
Also, I think it might help reduce the amount of macho and/or sexist bullshit you tend to find in a male dominated environment. I'm a bloke, and even I find that fucking depressing.
So it's not about dragging people in who don't want to do it, it's about removing the stigma which turns people away, and hopefully everyone benefits.
Attacking the root cause, which is probably a combination of societal pressures applied to the different sexes, pretty much from birth, is *hard*. It's especially hard if you're just the representatives of one particular career choice. How do you change the whole of society?
However, it is possible to try to attack the problem from the other side, and challenge the particular stereotypes at play, make the career seem appealing, and generally make the people you're trying to attract feel *wanted*. The more women who become engineers (or programmers, or plumbers, or whatever), the less the societal pressures will be an issue for others. And ultimately society *will* change.
This video is certinaly not going to do that. It's just patronising bullshit. I'm amazed it got as far as it did before they deleted it. It should've been stopped before someone wasted money producing it.
FFS - just highlight how good a career in science or engineering could be. What someone can achieve. How cool it is. Show some of the existing women in the field who are doing awesome and interesting work. Often all people need is a role model to aspire towards.