An indigenous man films a performance during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 14, 2020. In the 1980's Brazil's first indigenous Congressman, Xavante chief Juruna, went around with a recorder to tape conversations with other politicians because he said the white man's word was not to be trusted. REUTERS/Ricardo Moraes

Indigenous people film a speech given by Indigenous leader Cacique Raoni during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 14, 2020. In the digital age, threatened by destruction of their forest and the encroachment of farming on their lands, Brazilian tribes are posting video on social media and filming with cameras mounted on drones to tell their story and bolster their threatened cultures. REUTERS/Ricardo Moraes

An indigenous man films a performance during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 14, 2020. In the 1980's Brazil's first indigenous Congressman, Xavante chief Juruna, went around with a recorder to tape conversations with other politicians because he said the white man's word was not to be trusted. REUTERS/Ricardo Moraes

An Indigenous child films the speech of a Kayapo woman during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. At a meeting this week of hundreds of Amazon tribal leaders on the Xingu reservation to discuss ways to resist government plans to assimilate indigenous people, every speech and ritual dance is being recorded and posted on the Internet. REUTERS/Ricardo Moraes

Indigenous men film a performance during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

Indigenous people of Yudja tribe sing and dance during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 16, 2020. REUTERS/Ricardo Moraes