On 25.01.2014 arte broadcastet a documentary about the history of Star Wars.
I did not fully wath it yet, but I cannot remember to have seen this documentary anywhere. Maybe someone of you has an idea where this is from.
http://www.arte.tv/guide/de/050596-000/star-wars-die-geschichte-einer-saga
Since it is not online forever you can search on usenet for StWaDiGeeiSa
It has a german voice over and german subtitles.