Description: If someone is interested in making a media player plugin for pmwiki, then, this person, could take a look at MediaElement.js.
Some of its features are:
+ HTML5 audio and video players in pure HTML and CSS.
+ Custom Flash and Silverlight players that mimic the HTML5 MediaElement API for older browsers
+ Accessibility standards including WebVTT
+ Plugins for WordPres, Drupal, Joomla, etc.
+ Working in many browsers and devices.
Checking at the project's Github page, it seems to be maintained.
I haven't checked the code (I wouldn't know what to check for), but, as a reader, I see that this would be a very good media recipe for pmwiki.