The video is a screencast of RhNav - Rhizome Navigation visualizing the Blogosphere as a 3D graph using the technorati API. www.rafelsberger.at is used as a starting point.
The video shows a prototype application of RhNav - Rhizome Navigation in action: A graphical navigation interface incorporating realtime website traffic and user behavior analysis.
This is a proof of concept for an animation of tag-volume over time. The horizontal rule represents the passage of time, and the vertical rule represents the overall volume of tags at any given point.