List of video
https://www.youtube.com/results?search_query=heiner+fruehauf
the video I referenced watch first, perfect timing on all this content imho
https://www.youtube.com/watch?v=6EB-_3Ewpbs&t=172s
the video on gu syndrome
https://www.youtube.com/watch?v=XoI_LyKgW6w
nova