Recently, the SubBerlin documentary re-appeared on german TV. It not only tells the story of the legendary Berlin techno club Tresor but also is a great flashback and insight into that Zeitgeist and techno culture to that time. Starting from the fall of the wall it covers all the period until it’s pull down in 2005. Some great artist (short) interviews in there as well.
It’s available on youtube but I’ve only found the german version – dunno if there is one with translation or subtitles.