Content marketing is essentially audio/visual communication online that facilitates communication of relevant information.
As well as creating video content shown on the left, ive worked on video content syndication through 3rd party content aggregators such as Reddit, Digg & Metacafe.
It can involve new product press releases, industry studies/white papers, podcast interviews, client testimonial videos, even webinars.
The aim of content marketing is to facilitate a 'value exchange' between you and potential customers. Your content offers a solution and in return your potential customers give you their valuable attention.
Good content marketing should self evident and entertaining. It must prove why are why you are an authority on the product or service you are selling.