Videos from Zach Wahls and Rick Perry were among the five most-watched political videos of 2011, YouTube announced Tuesday.

Wahls is the University of Iowa student who defended his two-mom family at an Iowa House hearing considering a proposed measure that would repeal the state's gay marriage law by defining marriage as a heterosexual union in the Iowa Constitution.

The video of Wahls telling lawmakers that his family isn't any different drew 18.3 million views to become the most-watched video in 2011.

“I'm not really so different from any of your children. My family really isn't so different from yours. After all, your family doesn't derive its sense of worth from being told by the state, 'You're married, congratulations!'”

“No, the sense of family comes from the commitment we make to each other. To work through the hard times, so we can enjoy the good ones. It comes from the love that binds us. That's what makes a family,” Wahls said. (The video is embedded in the right panel of this page. Visit our video library for more videos.)

(Related: Ellen DeGeneres calls gay marriage supporter Zach Wahls a “hero.”)

Rick Perry's recently released anti-gay ad, titled Strong, drew 7 million views to become the third most-watched political video.

“There's something wrong in this country when gays can serve openly in the military but our kids can't openly celebrate Christmas or pray in school,” Perry says in the ad.

The ad has been lampooned by Stephen Colbert and GOP presidential rival Fred Karger. Parodies of the ad have overtaken the Internet.