excellent source of critical documentaries
Third World Newsreel (TWN) is an alternative media arts organization that fosters the creation, appreciation and dissemination of independent film and video by and about people of color and social justice issues. It supports the innovative work of diverse forms and genres made by artists who are intimately connected to their subjects through common bonds of ethnic/cultural heritage, class, gender, sexual orientation and political orientation. TWN promotes the self-representation of traditionally marginalized groups as well as the negotiated representation of those groups by artists who work in solidarity with them. Ultimately, whether documentary, experimental, narrative, traditional or non-traditional, the importance of the media promoted by the organization is its ability to effect social change, to encourage people to think critically about their lives and the lives of others, and to propel people into action. Established in December 1967 as Newsreel, an activist filmmaker collective, this NY group grew to become a network with branches across the US. Each different branch produced and distributed short 16mm films covering the anti-war and women’s movements, Civil and human rights movements, getting unique access to such groups as the Black Panther Party and the Young Lords Party. Newsreel’s activism attracted many artists who became well known filmmakers. The New York Newsreel became Third World Newsreel (TWN) in the mid-70s and strengthened its commitment to developing filmmakers and audiences of color. Today, TWN carries on the progressive vision of its founders, and remains the oldest media arts organization in the U.S. devoted to cultural workers of color and their global constituencies. 
Website: http://www.twn.org/ A group of five Children voices Nightmare in black and white
