"Yogis of Tibet" is a wonderful documentary on the few remaining Tibetan yogis that voluntarily decided to show and explain their secret and exclusive practices.
After a detailed description of Tibetan religious history from Padmasambava's religious revolution and the introduction of Buddhism in Tibet with the integration of the Bon religion, there are beautiful scenes of the retreats and caves utilized by yogis for meditation. A series of interviews with the Dalai Lama (by the way he is very humoristic affriming he would never want to be a yogi !) and yogis from Tibet and abroad explain the nature of yogi practice and exercises, meditation tecqniques and the deep transformation of the mystic's life after the three year, three months and three day retreat. There is an impressive section on the meditation with physical exercise of a young yogi never filmed before, which is alone worth all the movie.