Fortunately, this documentary was included on the DVD of the movie, Warriors of Heaven and Earth. That's because, unlike many DVD extras, it greatly enhanced the film and helped to explain some of the historical background behind the plot. A little MORE of this information would have been appreciated, though. In addition, it was really interesting to see the trouble they went to to create the film--going on location and often filming in the dead of winter (including the belly dancing scenes and the final battle--shot at 20 below zero Celcius). The care and dedication of the director and cast was exciting to see and gave me a greater appreciation for the movie.