A Video Sitemap uses the Sitemap protocol, with additional Video-specific tags as defined below. In its simplest form, a Video Sitemap can include a single tag to let Google know there is a video playable at a specific landing page URL. Optional fields let you specify other attributes of the video available on that page. The less information you provide in the Sitemap extension, the more Google will have to do to try to discover and extract that information. Google may use text available on your video’s page rather than the text you supply in the Video Sitemap, if this differs.

Once you have created your video Sitemap, you can submit it to Google using Webmaster Tools.

Here is a sample of a Video Sitemap entry using Video-specific tags:

xmlns:video="http://www.google.com/schemas/sitemap-video/1.0">

http://www.site.com/videos/some_video_landing_page.html

http://www.site.com/video123.flv
http://www.site.com/videoplayer.swf?video=123
My funny video
http://www.site.com/thumbs/123.jpg

http://www.site.com/videos/some_other_video_landing_page.html

http://www.site.com/videos/video1.mpg
A really awesome video

From more information visit google

Why Links Are Important?
Probably the word that associates best with Web is “links”. That is what hypertext is all about – you link to pages you like and get linked by pages that like your site. Actually, the Web is woven out of interconnected pages and spiders follow the links, when indexing the Web. If not many sites link to you, then it might take ages for search engines to find your site and even if they find you, it is unlikely that you will have high rankings because the quality and quantity of links is part of the algorithms of search engines for calculating relevancy.

Inbound and Outbound Links
Put in layman’s terms, there are two types of links that are important for SEO – inbound and outbound links. Outbound links are links that start from your site and lead to another one, while inbound links, or backlinks, come from an external site to yours, e.g. if a.com links to mydomain.com, the link from a.com is an inbound link for mydomain.com.

Backlinks are very important because they are supposed to be a measure of the popularity of your site among the Web audience. It is necessary to say that not all backlinks are equal. There are good and bad backlinks. Good backlinks are from reputable places - preferably from sites with a similar theme. These links do boost search engine ranking. Bad backlinks come from suspicious places – like link farms – and are something to be avoided. Well, if you are backlinked without your knowledge and consent, maybe you should drop the Webmaster a line, asking him or her to remove the backlink.

If you are not heavily backlinked, don’t worry - buying links is an established practice and if you are serious about getting to the top, you may need to consider it. But before doing this, you should consider some free alternatives. For instance, some of the good places where you can get quality backlinks are Web directories like www.projectinbound.com or www.somethinginmyeye.com