YouTube turns 20: From cat videos to AI

Twenty years ago this past week, YouTube co-founder Jawed Karim posted the very first YouTube video, titled "Me at the Zoo."

"All right. So here we are, in front of the elephants. The cool thing about these guys is that they have really, really, really long trunks. And that's cool. … And that's pretty much all there is to say."

YouTube was so new that our Charles Osgood had to define it for "Sunday Morning" viewers back in 2006: "A website that lets just about anyone post videos for the whole world to see."