Philipp Lenssen, author of Google Apps Hacks mentioned a really cool YouTube hack on Google Blogoscoped:
A Car’s Life is an interactive Arcade-style game using YouTube. To make it through a given level, all you need to do is click a button which appears. The video makes use of YouTube annotations, which can be linked to other YouTube videos. It’s a bit like the 1980s Dragon’s Lair in some respects: it has animations and somewhat stretches the limits of its medium, but it also has rather low playability. Choose-Your-Own-Adventure games – perhaps like Tube Adventures – might be more interesting in YouTube (anyone wants to write a YouTube-API-based video adventure export functionality for QML, the XML-based CYOA language?)
