One of the questions I get asked most often is what makes a viral video. Sometimes I make up an equation like 1(dog/cat/kid/) + 2(falls/dances/sings) x 3(couch/bathtab/hamster wheel) = viral, or 1(individual) x 2(fame coefficient) + 3(human frailty) = viral. But truth be told, it’s hard to say what makes a viral video. It is, however, easy to say what makes a video actually go viral, and that’s sharing it. I know, it’s a no-brainer. But here’s how to help make your favorite videos break out into the world.

This is our share panel, which you probably recognize if you’ve ever embedded one of our videos.

But there’s a lot of other cool stuff there too. By using the Digg, del.icio.us, Facebook, MySpace, and other buttons on our share panel, you can help propel your favorites into the dazzling spotlight of the web. You have to register for these sites, but once you do, you can start showing your love for videos across the web.

Here’s a video I really Digg. If you like it too, give it your vote.

-Kent, Yahoo! Video Team