"For some time now the cinema auditorium has given me sleepless nights," writes film-maker Clemens von Wedemeyer. "What would it be like if the walls in a multiplex cinema were to vanish and you were free to shift your gaze so that your eyes could wander over to the next screen. Or the inside became the outside and the walls of the cinema disappeared." In his installations the screen becomes not only a projection surface but also a membrane, the seam between the performance and the locations where it was shot. The film's intervention makes historical and political narratives become visible in...