This clip is from the mini-series “Into the West.” It depicts the moment children arrived at Carlisle and were forced to wear western clothes, take on English names, and cut their hair.
Source: carynfmiller. “Into the West-Carlisle Indian School.” YouTube video, 9:57. Posted [September 17, 2011]. https://www.youtube.com/watch?v=yfRHqWCz3Zw