How are the two products - the books and the DVD program - similar / different?

The books have a written explanation how the course works when I wrote if for a classroom setting.  The DVD curriculum explains the rationale of the method to a home school parent, walks the parent and child through the first complete assignment where the child practices all the skills of the historian, and the DVD shows me leading two different groups of students through Socratic discussions based on the ancient and medieval curriculum.  The DVD provides real footage of Socratic Discussions based on the Ancient Civilizations and Medieval Civilizations curriculum, along with in depth tips of how a teacher can bring out the best in their student discussions.