Overpopulation?

I'm not sure about you guys, but I often hear concerns about overpopulation, generally in response to pro-life arguments and the extreme fertility of some families like The Duggars, who are expecting their 19th biological child this spring. I'm not trying to begin a huge abortion debate, although I will tell you that I am pro-life. If you'd like to know why, I'd be happy to tell you my reasons, but I'm not going to engage in a scream-match, crazy-person debate full of name-calling and ad hominem attacks, because I think that those are unnecessary. I'm also not trying to say that everyone should have 19 children, or that it's even fathomable to do so. Nor am I trying to downplay world hunger, or other social problems that are often explained by overpopulation. But I came across this video, and I think it's really interesting, considering that so many issues seem to come back to overpopulation.  I'm having html issues, so you'll just have to click here to see the video!

What's the deal? Thoughts?