I watched this after I did watch the Legendary Cut of the movie, which is slighlty better but still not great or even good. Interestingly this is called _The Director and the Jedi_ instead of _The Making off: The Last Jedi_. Everyone should draw their own conclusion about that. It seems to dirtectly relate to the, shall we say, creative differences of opinion between Hamill and Johnson. It doesn't feel like a making of but rather like a commercial for teh director where at the end everyone agrees with him.
There is so much unnessessary and downright stupid stuff in the movie and I get the feeling that Johnson's take was: "Hey I have this huge budget to spend, so, what the h*** let's spend it". Even if it does nothing for the story.
I didn't like Johnson as a director/writer before but after seeing this I don't like him as a person as much as this is possible from not knowing someone at all. But you know, how there are certain people you know you just wouldn't get along with ? Like that.
Those are the two major things I got out of this "documentary"