This seems to be a very intersting movie covering the Dakota War of 1862. If you take a look at the promo video (link below) you can see that is well produced by Sheldon Wolfchild and that Minnesotan author Mark Diedrich is part of the project. Mark, who we know from his excellent books on American Indian history, just sent me a message that the entire film has three parts, but they are not yet finished. So it's not available. However Sheldon Wolfchild has hopes of showing it around Europe when its completed. I will let you know if they are any more news on this project.
Mark Diedrich also started work on a Little Crow documentary with Sheldon Wolfchild's videographer. I´m looking forward to see these movies.