There are quite a few on Youtube search for me. The fifth one down shows your friend Kassem right up front, the Johnny Weissmuller doing something that would have taken Ron Ely out long before age 86 had he tried ithttps://www.youtube.com/results?search_query=johnny+weismuller+Jungle+Jim
Not “Jungle Jim”, but close.
Weissmuller’s film son, “Skipper”, also brings back no recollections.
Probably half hour shows on Saturdays, and maybe only a few seasons?