The Wizard of Oz (is the) most 'influential' film of all time according to network science...
influential to others making movies, that is:
The Wizard of Oz, followed by Star Wars and Psycho, is identified as the most influential film of all time in a study published in the open access journal Applied Network Science.
Researchers at the University of Turin, Italy, calculated an influence score for 47,000 films listed in IMDb (the internet movie database). The score was based on how much each film had been referenced by subsequent films. The authors found that the top 20 most influential films were all produced before 1980 and mostly in the United States. Read more at: https://phys.org/news/2018-11-wizard-oz-influential-network-science.html#jCp
it's not on youtube, but you can download it from Internet archives: LINK
here's a short snip from the film.
by the way: Internet archives is asking for donations. Just in case you have money left over