Brainient - TNW Startup Rally

URL: Brainient.com
What they do:
Interactive video advertising. Creating layers that are applied on top of videos (magic layers) that enable interactivity with the video.
As an advertiser, you can build layers that publishers can add to their videos.
Comment: Sounds extremely cool! Especially considering the explosion of video content on the web right now. Their website, however, is kind of disappointing… It is not super obvious how you get started using their service!