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salam every one, this is a topic from google web master centrale blog: Written by John Fisher-Ogden, Software Engineer, and Amy Wu, Associate Product Manager

In our effort to help users search all the world's public videos, the Google Video team joined the Sitemaps folks to introduce Video Sitemaps—an extension of the Sitemap Protocol that helps make your videos more searchable via Google Video Search. By submitting this video-specific Sitemap in addition to your standard Sitemap, you can specify all the video files on your site, along with relevant metadata. Here's an example:

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
     xmlns:video="http://www.google.com/schemas/sitemap-video/1.0">
<url>
<loc>http://www.example.com/videos/some_video_landing_page.html</loc>
<video:video>
   <video:content_loc>http://www.example.com/video123.flv</video:content_loc>
   <video:player_loc allow_embed="yes">http://www.example.com/videoplayer.swf?video=123</video:player_loc>
   <video:title>My funny video</video:title>
   <video:thumbnail_loc>http://www.example.com/thumbs/123.jpg</video:thumbnail_loc>
</video:video>
</url>
<url>
<loc>http://www.example.com/videos/some_other_video_landing_page.html</loc>
<video:video>
   <video:content_loc>http://www.example.com/videos/video1.mpg</video:content_loc>
   <video:description>A really awesome video</video:description>
</video:video>
</url>
</urlset>

To get started, create a Video Sitemap, sign into Google Webmaster Tools, and add the Video Sitemap to your account.

this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com