I did not like The Structure of Man DVD’s. I mean, it looks good at first, but then it gets too confused, especially the anatomy part. I do not recommend those DVDS at all.
Vilppu DVDs aren’t bad, but the anatomy lessons are not so clear as if you were looking at anatomy drawings from anatomy books. From Vilppu I only recommend the lessons when he uses geometric shapes (spheres, boxes) and gestual lines to create movement and dinamic poses, and understand volume. From Vilppu is really helpful that you pay close atention to the gestual drawing lesson.
The anatomy part is better you learn from anatomy books and bones and muscles photos. Use the real thing (life drawing, skeleton photos, muscles photos) not the interpretation of another guy of anatomy of the human body. The only true method to learn to draw is the one you feel confortable with, by creating your own approach. Otherwise you will end up being forced to adapt your natural way to draw to the way of another person.
Best of lucks!