I just happen to be reading a biography on Leonardo and the chapter about this drawing, where it's pretty clear that he was inspired by Vitruvius - but in typical Leonardo fashion, he checked and remeasured all of the measurements given in the book, and then made his drawing based on the proportions that he agreed with
Great video man, subject I haven't seen talked about before.
I just happen to be reading a biography on Leonardo and the chapter about this drawing, where it's pretty clear that he was inspired by Vitruvius - but in typical Leonardo fashion, he checked and remeasured all of the measurements given in the book, and then made his drawing based on the proportions that he agreed with