Video is one of the most influential and powerful marketing tools. Many businesses use video clips on their websites in order to provide a more personable approach to their customers.
In fact, Youtube could be considered the second biggest search engine after Google. More searches are done through Youtube than Yahoo.
The short of it is that you need a Youtube presence in order to get a piece of this growing market. Adding links to your website in your video descriptions is a great way to help improve your search engine optimisation.