Vom Bruch describes Augenzeugen (Eyewitness), subtitled Behind the Doors of the Haus der Kunst, as a series of "philosophical speculations" on the famous Third Reich propaganda building in Munich, which opened in 1937 to serve as the official German art museum. In his video, archival footage of the museum's double doors open and close repeatedly upon a succession of appropriated filmic images from newsreels and cinema: bomber jets, a goose-stepping cartoon cat (Tom from Tom and Jerry), Hollywood starlets (Elizabeth Taylor, Judy Garland) singing in close-up, the bombing of a European city. The slow, repetitive motion of the doors establishes a droning rhythm, countered by lively accordion music, which underscores what vom Bruch has termed "ironically charged images of passion and war."

Klaus Vom Bruch beschreibt Der Augenzeuge (Eyewitness – Behind the Doors of the Haus der Kunst), als eine Serie von "philosophischen Spekulationen" über das von den Nazis erbaute Haus der Kunst in Muenchen. In diesem Video verbindet er Archivmaterial aus verschiedenen Bereichen des Kinos und des Fernsehens, welche durch das wiederholte Öffnen und Schließen einer Schwingtür strukturiert wird.