This plugin by Amit Agarwal will create sitemaps, which are a way to tell Google, Bing and other search engines about web pages, images and video content on your site that they may otherwise not discover.
The Image Sitemap plugin will generate a sitemap for your WordPress blog with all the image URLs that are used in your posts and pages.
Video Sitemaps will help your site pages rank in both video search results as well as Google’s universal search. More info google.com/videositemaps
Plugin homepage: http://www.labnol.org/software/xml-video-sitemaps-for-google/14085/