Originally an instrumental group with the classical instrumentation of guitars, bass and drums, for their numerous records as well as for live gigs Die Haut frequently collaborated with likeminded international singers such as Lydia Lunch, Nick Cave, Jeffrey Lee Pierce or Debbie Harry.
While still a student, he made several music videos, either for Die Haut ("Der Karibische Western") or for Nick Cave & The Bad Seeds ("Tupelo", "The Singer" and "Mercy Seat").
With Heiner Mühlenbrock, he made the feature-length film OK OK – Der Moderne Tanz.
In numerous documentary films and series, Dreher dealt with issues from the area of popular culture.
For example, in the 18-part series Lost in Music, in cooperation with, amongst others, Rolf S. Wolkenstein, Ellen El Malki and Rotraut Pape, Dreher covered contemporary musical genres and their associated cultures and (life-) styles.