Riefenstahl footage?

The mountain/mountaineering footage when he leaves the valley is remarkable. It seems authentic and dramatic (the upslope winds are awfully obliging...). Some other footnotes suggest that some of her footage was used. Anyone know for sure? Recognize any directly from some of her early movies, such as "Storm Over Mt Blanc"?

[oops- I do see in "Connections" "Edited from" "Avalanche" - the US title for "Storm Over Mt Blanc". Also, "Trivia" has asst director Andrew Morton cite "stock footage from two German mountaineering films". Just wanted Riefenstahl credited, if due. Wikipedia's remarkable post about Riefenstahl mentions director Arnold Fanck's "mountain films" that lead her into her own movies. Despite politics, she was a remarkable artist. ]

[ also a comment on some of the other threads- regarding pacifism- I was always taken by a Star Trek episode set in the 1920's- Kirk has to not interfere in the death of a charismatic pacifist just before the tumult of the thirties and forties. ]