Including Gallery Location in Video Sitemaps
If your website has many videos related to a single subject and group together on a top-level page/gallery then you can now use video Sitemap to inform Google the URL of the gallery page where videos show. It will be easier then for the users to find what they are searching for. In specifying the URL of the gallery page use the optional tag & “video:gallery_loc” in a per-video basis.
Sample screen shot of a Site with videos group on a top-level page:
*image taken from Google Webmaster Central Blog
Note: Only one gallery_loc is allowed per video.
You can refer to this article for the information:
http://googlewebmastercentral.blogspot.com/2010/09/video-sitemaps-is-your-video-part-of.html
