I use a ton of videos on my site for tutorials. Good SEO for them is a top priority. Here is an infographic provided by LocalVox.com that gives you some good insight. Also, I use the SEO Video plugin by Yoast as well, which I will be reviewing in an upcoming post.
As quoted from their post:
Video is an interactive way to showcase your company, products and services in an easy to digest format for customers. It is so effective that 64% of website visitors are more likely to purchase a product online after watching a video.