This is by far the best documentary on the Kumbha Mela available anywhere. If you are interested in the Kumbha Mela and want to understand what goes on there this is film you need to see.
This is the Kuli Mela , a gathering of about 700 young and young at heart Hare Krishna devotees, some who spent some time in ISKCON's gurukuls. This is at New Vrindavan, West Virginia.