UPDATE: This film looks to be available on Amazon prime.
I just happened on this. A Idaho Public TV/PBS show about the Nez Perce tribe’s project.
Not the same one as was discussed in the ‘secret horse’ show thread. It’s available on line here:
http://video.pbs.org/video/2365398118/
But says it expires TOMORROW (Monday).
Filmmaker Janet Kern follows the story of the Nez Perce tribe’s effort to get their horses back through breeding modern Appaloosa with a rare desert breed from Iran, and developing their own horse registry for the animals. The effort also included an extensive youth program. The documentary includes the history of the Nez Perce and their horses, and the ups and downs of the modern program.