His video on the special effects of Fight of the Navigator is one of the best "making of" videos I've seen. They should license it and put it on the Blu-ray, it's that good.
Nerdstalgic, CinemaStix, CGY, Corridor Crew, captainmidnight are some of my favorites. Some of these focus on TV series too, up to you if you're into that
They sadly let some questionable connections shine through every now and then. Nothing terrible but enough to make me more cautious of opinions of theirs than i used to be
Corridor crew, they've given me a lot of insight regarding vfx and editing, and i genuinely have learned a lot from them. Quite an inspiring group of people imo!
I got odd cryptochud vibes that I couldnt put my finger on. I heard they did a video on Twin Peaks The Return and that sounds like a comedy sketch with a narrow appeal.
Surprised to not see anyone in here mention Movies with Mikey (on YouTube under FilmJoy). He does really thoughtful movie analysis with great audio and video production. He's one of my favorite creators.
He's also on Nebula for people who'd rather see a video edit that can employ fair use without being taken down automatically.
More on topic: I highly recommend Jared Bauer and Wisecrack if you like philosophy, politics, and how it relates to media.
Less historical, more comedic: After Hours, Cracked (their older stuff), and Dr. Jordan Breeding are comedic analysis of various media.
In depth analysis/socio-political insights/research: Jessie Gender for various insights into media (including animated shows like Lower Decks and Invincible).
Animation, I like Johnny 2 Cellos and Offbeat Kiki. Johnny in particular posts more often and has in depth takes, but Kiki, when she does post gives more nuanced takes imho.
Actual amazing animated projects you can watch on Youtube include Lackadaisy, Helluva Boss, and Hazbin Hotel.
Dial the Gate. Series of interviews with people involved in making of Stargate TV show (not just actors bit people at every level). It's over 200 episodes now.