Add Video Location in your Video Sitemap

If you are going to add video information to a Sitemap or mRSS feed you must add the location of the video. To add video location you need to include one of two tags, either the videoplayer_loc or videocontent_loc, for mRSS feed you need to use media:player or media:content. To be ranked your video in search engine need to verify that there is actually a live video on your landing page and to extract metadata and signals from the video player. If one of these tags is not include, search engine will not be able to verify the video and your Sitemap/mRSS feed will not be crawled.

The Url in sitemap should be unique in entire sitemap and mRSS feed also.

Article Source: http://googlewebmastercentral.blogspot.com/2010/08/video-sitemaps-understanding-location.html