Wow! super cool.
That looks like a plugin by Luxology, although I can't find more about it from the link on the YouTube page:
To learn more or to purchase the CAD Loaders, please visit http://www.luxology.com/store/store/CAD_Loaders_for_modo/index.aspx

More info from the Luxlology modcast on this thread:
http://forums.luxology.com/discussion/topic.aspx?id=62281