Phraseanet is an Open Source Digital Asset Management (DAM) software. Web-based application intended for managing multimedia databases (photo management but also video, audio and PDF documents). Includes its own full-text / thesaurus search engine.
PHPvidz is a complete website that stores the URL of your favorite Google or Blip videos and plays them back. Basically this is a YouTube channel clone for any online video provider. No database to install. Just upload to your PHP webserver.