There are three problems in trying to make a documentary about Lorne Michaels, who created and continues to run “Saturday Night Live” (except for five years) now for more than half a century. The first is the many, many documentaries already made about the show and the people who have appeared on it, including Steve Martin, John Belushi, Chris Farley, so this latest one is a small addition to a big jigsaw puzzle. It goes over events that have been thoroughly covered elsewhere, with some new archival material, like Michaels’ brief appearances as a performer himself in Canada when he was in his 20s and from a brief substitute for “SNL” that lasted less than a dozen years.

Second, Lorne Michaels really did not want to have a documentary made about him. As his close friend Paul Simon says to director Morgan Neville in the film, “You’ll capture a guy who is not happy.” So the movie is not about guy who is not happy, but about a guy who isn’t happy to have a cameras on him. Michaels likes his life, his job, and especially his home and family very much and he is, as anyone in that job would have to be, very even-tempered.

Third, because he is so even-tempered, and often downright dull, he is not a dynamic film presence, and because his job is “SNL” that is a gigantic contrast with EVERYONE ELSE on screen. Neville tries to jazz it up a bit with some animated segments, but we have to keep coming back to Michaels, who is not introspective beyond saying how much he loves nature or analytic about what does and does not work in the show (we see him re-arrange the order of the sketches but we don’t know anything about why).

I’ve watched “SNL” since the very first episode and have stuck with it through all of the ups and downs that are documented or in many cases glossed over quickly or ignored entirely in this film. I’m enough of a fan that I enjoyed it, though it is in no way an indispensable or particularly valuable addition to the record. Any serious fan has seen plenty about the early days, the “is ‘SNL’ past its prime” headlines the rocketing unknown-to-megawatt star trajectories (Eddie Murphy) and the “wait, what’s that one’s name again” cast members, plus the firing of Norm MacDonald (here’s a great take with David Letterman).

One benefit of surrounding himself with some of the most brilliant impressionists and comedians in the world is that most of them have a take on Michaels’ slightly stentorian delivery (and on his disappointed sigh). It is a lot of fun to hear so many of them almost subconsciously slip into his voice. And it’s a lot of fun just to hear them talk about him, his quirks (the entire schedule is built around his preferring to start the day at 4 pm and he is constantly munching on popcorn). The best moments are just listening in on a conversation with comedy legends John Mulaney, Bill Hader, and Fred Armisen, or the comments from Conan O’Brien, writer Jim Downey (see the documentary about him), and Paul Simon. Mulaney, hyper-perceptive as always, tells the film’s most illuminating story.

We know, as we watch the archival footage, how many of those people have died. But there’s hardly any sense of how those losses affected him. We hear about the pressure to revitalize the show, but not what steps he took. Instead we hear him fretting about whether host Ryan Gosling has a doctor for his raspy throat. The other documentaries, the books about “SNL,” or any given episode of the show will tell you as much and be more entertaining.

Parents should know that this film has references to drinking and drug use.

Family discussion: What are some of your favorite “SNL” sketches and stars and why?

If you like this, try: the four documentaries celebrating the show’s 50th anniversary, especially the one from Questlove about the music.