Try Claude Lanzmann's "Shoah". It's a very unusual documentary without any material from historical film archives. He talked to jewish survivors, to their neighbours and also to Nazis, that were discovered by him. He filmed many locations as they were in the 70's (when the documentary was finished) and much much more. The documentary is about 10 hours long, and it took him several years to create. Lanzmann participated in the french résistance.