REPLAY is an open solution developed in java to integrate, index, archive, and distribute audiovisual lecture recordings on a large scale. The project started at ETH Zurich, Switzerland, in 2006 and unfolds the intellectual value lectures hold by providing for content-based access and opening audiovisual material to an interactive and collective enrichment by users.
More detailed information on the features of REPLAY can be found on the features page.
Ref.: http://replay.origo.ethz.ch/