The german channel WDR broadcasts online a documentary on Pierre Boulez and more particularly about “Pli selon Pli”. The german ensemble Musikfabrik and a set of german students were conducted by Pascal Rophé.

http://www1.wdr.de/mediathek/video/sendungen/westart-klassik/video-klangmyriaden—pierre-boulez-pli-selon-pli-100.html