AWE Video is a video post type for WordPress that includes a podcast feed and creative commons licensing options for each video.

AWE Video

AWE Video is a video post type for WordPress that includes a podcast feed and creative commons licensing options for each video.

CodeAndReload

This plugin provides the ability to tag media in the media library as having a Creative Commons (CC) license. 
The license shows up on the attachment page and is optimized for search engines (SEO) using RDFa metadata. 
It optionally extends the search form to allow searches for CC-tagged media. It can display a text link 
to the license, an image link to the license, or both.
<h3>Support</h3>
Technical support for this plugin will be provided via the WordPress plugin forum. Additional support may be 
available at <a href="http://www.codeandreload.com/wp-plugins/creative-commons-tagger/" title="Creative Commons Media
Tagger at Code and Reload">plugin’s homepage</a>.

Creative Commons Media Tagger

Allows tagging of media as having a Creative Commons license. License info shows as link and/or image and is searchable. Search engine optimized.

AWE Video vs Creative Commons Media Tagger