Sorry that this is not a movie, but Sidney Lumet wrote a great book on the movie making process: https://www.amazon.com/dp/B004089HZC/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1 . I found it very informative and just hearing how 1 guy does it and the choices he makes informed how I see how other filmmakers handle the same issues Lumet described in the book.
And Making Movies by Sydney Lumet: A masterful director. https://www.amazon.com/Making-Movies-Sidney-Lumet-ebook/dp/B004089HZC/ref=sr\_1\_1?keywords=making+movies&qid=1639725393&s=digital-text&sr=1-1