She seems to have missed the real reason why Feynman became so "popular": his series of textbooks. Maybe his name is not associated with such historical discoveries as those of Newton, Boltzmann or Einstein are, but writing one of the best textbook series is also a good reason to be famous, at least for as long as the content will remain relevant. Feynman, to me, is the American Landau: A mathematical and scientific genius whose immensely valuable legacy consists of teaching and textbooks rather than any novel breakthrough in theory.
Apart if you want more clicks on YouTube, I don't think it's fair to call him a sham, unless you believe every popularity is a sham, but I don't think it's the case being made here.