This video is a book trailer for Amazon book "Cancer: Medical Triumph with Self-Oxygenation Therapies". The link to this book is: http://www.normalbreathing.com/cancer1.php
The video describes the content of the book: facts about low O2 in cells in people with cancer, heavy breathing and clinical experience of Russian and Ukrainian doctors in relation to cancer. The video is for researchers in oncology, people interested in alternative health, and patients with cancer.