Nope. Videos have no direct effect on SEO. People like viewing videos, but they have to first find your site.
Videos will not do anything to boost your rankings unless you are picking up links to the pages with the videos. They do help retain traffic, because if someone finds a video they like, they will probably look around to see if you have other interesting videos.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin