[The Public Domain Review http://publicdomainreview.org/] hosts works in the public domain. Linterna Mágica works out of the box, but the extracted links are not correct.  It seems video and audio clips are hosted at The [Internet Archive  http://www.archive.org]. Few changes in the regular expressions should be enough to have it supported.

The flash embed code should be examined and if possible, recognised in a general-purpose way, so it could be used in other sites using similar approach. The flash player used at The Internet Archive is [flowplayer http://flowplayer.org/]. Flowplayer's configuration options are documented at http://flowplayer.org/documentation/configuration.