UCSC's Open Archive of Congressional Proceedings

Metavid (University of California at Santa Cruz) "seeks to
capture, stream, archive and facilitate real-time collective
[re]mediation of legislative proceedings. Metavid makes
use of entirely free and open source software and video
codecs to make both the footage and the architecture of the
site available, accessible and recontextualizable."
(About Metavid)

The service uses public domain video feed from C-SPAN
to generate video archives of congressional floor proceedings.
It can be searched by keyword or speaker name and can be
browsed by date or popular prior searches.

Hat tip to beSpacific (8/20/2007).