A good video. I believe the content is largely pulled from a book on the topic, but this is definitely a case where video helps, and if you haven't read or even heard of the book (like me), it's new stuff, not just a rehashing of the same old Star Wars stuff, and interesting from a film school point of view, not just a Star Wars point of view.

I'll also just echo the grandparent post and say that you can see this pattern in a lot of artists: Heinlein, probably JK Rowling (her later books definitely were getting flabby and she's had no comparable success since the original series), all kinds. Hollywood has an interesting pattern where a director makes a huge hit, and they kind of have a defined structure for letting them make a "passion project" before putting them back under some editorial control. The passion projects usually do fairly poorly. I'm not sure what happens if one of them becomes a big hit. That would be interesting to see.