YouTube announces video annotations

Reported first on NewTeeVee, and more details about it here.
I'm not 200% convinced of the way they've gone about implementing it, but it's a start.

If you are a theorist interest in learning more about such deep, dark plots by GooTube, go ahead and download Marc Davis and Ryan Shaw's paper titled "Towards Emergent Representations for Video"

Enjoy. Annotate.