It may take a little getting used to, but if you have a fast enough internet connection, you can play Street Fighter on YouTube. Well, not really, but it's a clever little trick executed with notes, and it's about as interactive as I've ever seen YouTube.

It's kind of impossible to die unless you have the motor skills of a newborn giraffe, but it's pretty fun nonetheless. Give it a try, (will direct you to a new page when you start the actual game):