This has been in German cinemas, a 90 minute documentary film, and I recommend viewing it (in German). I learned a lot from this.
Frank Farenski is a television journalist with long professional experience. The film is available under a Creative Commons Public Domain license, so as to reach as many people as possible. This page at the producer website has more background information on the project.
Frank Farenski also recently started a Twitter feed. I just followed.