By using the Facebook tracking pixel or the Adwords pixel, you can help to define your audience and work to entice them to come back to your site. Let's say the didn't finish their purchase or they simply showed up and left after adding something to their shopping cart, or they filled out a lead form and disappeared, you can re-target those individuals.
While there are several platforms for doing this, clearly YouTube is the most popular for doing this. However, video marketing is also a great form of both content marketing and SEO on its own. It can help to provide visibility for several different ventures, and if the video is valuable enough in its message and content, it will be shared and liked by droves, pushing up the authority of that video through the roof.