As Cowboymachito says, "If you want to know about Custer, then get this one...", I would add this, even though it may go without saying : And if you want to know about CRAZY HORSE, too.
Of course, both biographies, that of Custer and of CRAZY HORSE, are usually told together, it's hard to tell one without the other.
Being myself more interested in the Sioux leader and winner of the battle of the Little Big Horn, than in Custer, I was rather pleased. I was curious how he would be represented, knowing that (much unlike many of his Indian contempories such as Sitting Bull) no photo, interview, etc, had ever been taken of him by any whites as he was a retiring person, and I was not disappointed. His side as a mystic and 'Dreamer' is shown also.
Scenes of indian life ( Cheyenne and Sioux) alternate constantly with Custer's side of things. The background music on Indian scenes is Indian ( chants, Native flute...), as opposed to classic European style music like in too many 'indian films'.
The cover of this video may look a bit old-fashioned, but I'd say it's a modern film.
We get to know a bit of Red Cloud too - who sees things a little differently from Crazy Horse.
As far as I'm concerned, a good, unromanced biography has yet to be written about CRAZY HORSE ( and probably never will), because we have relatively little material about him apparently, so I value any bit we can get.
And just another thing, not appearing at this time on this page: BUFFY SAINTE MARIE is the narrative Indian voice.