There are many videos and podcasts available to help you learn about Native peoples--their history, their culture, and the issues they face. This documentary series, available through PBS, is one such relevant video series that can help serve as a starting point to help you understand Indigenous Americans better.
This is another documentary, available through Films on Demand, that describes the history and culture of several Indigenous tribes.
A documentary about the differences in how Westerners and Native Americans view the world around them.
A history of the Pequot War, America's first declared war.