Heinrich Kusch did some excellent work on this. Here[0] are some video documentaries. Some of his findings will blow your mind. 0. https://www.unterwelt-kusch.

Heinrich Kusch did some excellent work on this. Here[0] are some video documentaries. Some of his findings will blow your mind. 0. https://www.unterwelt-kusch.com/dokumentation/film-und-audiodokumentation/ https://www.unterwelt-kusch.com/dokumentation/film-und-audio...