I really don't know the answers to your questions, although I have had the "Save Your Life" Video's since around 1987 or so many years ago. The video's are packed full of specific case examples, and show step by step every aspect of the Incurables Program, with intense natural healing methods and techniques provided in detail in the manual as well. I bought them as an investment in health, forever, as knowledge like this is priceless. I have some of Dr. Shulze newer video's, not from Biser.
I don't know about any "politics" or other details, other than what Biser and Shulze did together was an incredible amount of detailed, thorough, and specific information covering truly "incurable" cases with natural healing and herbal methods.
I don't know if this helps, but I can tell you that the Save Your Life Video's are very jammed packed, and even recipes, formulas, and a few sources are covered in the manual, as well as full video instruction by Dr. Shulze both in the kitchen, and bathroom for making herbal treatments, extracts, poultices, the cold sheet treatment, etc. etc. etc. It's very, very thorough, and cover's a lot of material that I have never seen or heard of from any other sources anywhere.
I only have a few of Shulze recent videos. If you are looking for the full incurables program, and a literal "Natural Healing" and herbal course or "university" on video, then I do highly recommend the www.sambiser.com course.