Jonathan Joss, the Comanche actor who played Kicking Wolf, speaks first in the featurette. He describes what it is to be Comanche:
But the filmmaker could've edited this passage into something more passable. Or the filmmaker could've asked Joss to repeat himself once he knew what he wanted to say.
For more on the subject, see TV Shows Featuring Indians.
P.S. Joss is known for supplying the voice of John Redcorn on King of the Hill, of course.