Video content is one of the most popular rich media formats in the world. For example, Google's video site video.google.com is the largest video search property on the Web. One of the best ways to improve your site's appearance in video search results is to make sure that Google knows about all your rich video content.
When you submit a Sitemap to Google that includes video information in a supported format, we will make the included video URLs searchable on Google Video. When a user finds your video through Google, they will be linked to your hosted environments for the full playback. Search results will contain a thumbnail image (provided by you or autogenerated by Google) of your video content, as well as information (such as title) contained in your Sitemap. In addition, your video may also appear in other Google search products. While we can't predict or guarantee when or if your videos will be added to our index, as we make planned improvements to our product, we expect both coverage and indexing speed to improve.
You can create a separate Sitemap listing your video content, or you can add information about your video content to an existing Sitemap—whichever is more convenient for you.
The Google video extension of the Sitemap protocol enables you to give Google descriptive information—such as a video's title, description, duration, etc.—that makes it easier for users to find a particular piece of content. Google may use text available on your video's page rather than the text you supply in the Sitemap's video content, if this differs.
It's an excellent way to make sure that Google knows about all the video content on your site, especially content that we might not otherwise discover via our usual crawling mechanisms.
Adding video information to a Sitemap
You can create a Sitemap based on the Sitemap protocol, or you can use an existing mRSS feed as a Sitemap, or both.
Your Sitemap will need to include the following minimum information for each video: title, description, playpage URL, thumbnail URL and the raw video URL or URL to Flash video player. Without these five pieces of information, Google cannot surface your videos in our results.
Once you've created your Sitemap, you can submit it using Webmaster Tools. More information about adding video information to a Sitemap.
Recognized file types
Google can crawl Flash SWF objects and the following raw video file types: .mpg, .mpeg, .mp4, .mov, .wmv, .asf, .avi, .ra, .ram, .rm, .flv. All files must be accessible via HTTP. Metafiles that require a download of the source via streaming protocols are not supported at this time.