I've played around with Youtube's video annotation but not until recently did I discover that it actually allows users to include hyperlinks (why wouldn't it, duh?). In the meantime there are a couple of great examples where filmmakers have put together a series of short movies where the viewer decides the course of the story. The concept is obviously not new, but all of a sudden available to anybody and really taking 5min bite-size online video to a different level.

I really think this would be a great way to present information in civic engagement projects, where participants make trade-offs and see a different course of action depending on the choices they make. Will put a demo together shortly...