It The search engines understand the benefits of real people ranking what pages on the Internet are actually good. Therefore they place high relevance on the top Social Bookmarking sites. You should use this to your advantage by bookmarking your video pages on bookmarking sites such as Delicious, Stumble Upon, and Yahoo Buzz. You should setup accounts on these bookmarking sites and bookmark all your webpages. This will help increase your webpage's search engine ranking and traffic
Social bookmarking is one of the good strategies to use in link building, in order to make it effective you should create a proper account give your site a good description and create a reputation to your account
There are lots of good social bookmarking sites. Just write a small description that more informational (not just an ad). Be sure to include your keywords and submit. Also work on growing you list of friends and followers so they can vote for your bookmarking and help it get better exposure within the network.
Social bookmarking is undoubtedly an effective way of doing off page SEO. But unless your posting will reach a top position (can be done when others vote it) you can't expect to get target traffic from there.