Surya Dash, a filmmaker from Orissa, has produced a 96 minute long documentary film Niyamgiri – The Mountain of Law. Niyamgiri is the mountain, sacred to the Dongaria Kondh people, which is threatened by a bauxite mining project controlled by London-listed Vedanta plc. The film is available on youtube (in sections) in full.
See http://www.youtube.com/user/niyamgiri.
Survival International’s vignette on Niyamgiri and the Dongaria Kondhs,  Mine: Story of a Sacred Mountain can be downloaded from http://www.survival-international.org/films/mine.