html5media
html5media is a DITA-OT plugin and authoring UI for media insertion
...When the DITA-OT outputs HTML to an HTML5-aware browser, the html5media plugin transforms the DITA media xrefs into HTML5-complient video, audio and canvas tags. The authoring UI helps writers preview media before insertion into DITA source. XML playlists provide a means of storage for media metadata.
There are two zipped files to download. One contains the base code; the other contains sample media files. Click "Browse All Files" to find both.