Actually, the DVD's are really good. They are very practical! I was just teasing gmumoz. I apologize. SKH does an excellent job demonstrating style, form, and technique, as well as explanation.
Anyways, what is the whole stink about which art/style is the purest, and who is watered down or not. If you really take a look at the whole picture, you'll find that unless you are actually studying under Dr. Hatsumi, you can't say you are Bunjinkan. Even then, he has changed his style as well. Any other sensei, anshu, master is a branch of their sensei. You can't actually say that it is the original art since everyone is different and teaches different. I say stop bickering about who's style is purest like children and encourage everyone to perfect their own art/style so that it will benefit style, life and community.