jMediaelement is a neat jQuery extension for managing media files on your site. It works with HTML5′s tags.
You can style the media elements on your site with simple CSS.
Like other similar plugins, jMediaelement supports fallback to Flash for older browsers.
It currently supports ogg, mp4/mov, WebM, flv, youtube videos, and some other formats.
For better understanding what you can do with jMediaelement, take a look at the demos.