videojs/video.js — pull request #833 by dmlap (2013-11-11 22:56:45+00:00)
Title: Allow poster to be changed after init. Fixes #525 

When poster() is called with a URL, fire a `posterchange` event to update the PosterImage source and update the video element attribute. This PR avoids creating multiple img element fallbacks on IE8 whenever the `src` attribute is updated.