The Youtube channels I would recommend are the following:
Tech/Science
S3 - The stories of people working to change the world.
Modern Day Eratosthenes - A great STEM communicator who provides a moderate level breakdown of STEM topics. Videos are less than 12 minutes long.
Ziroth - This channel focuses on highlighting new science and engineering projects that are helping the world transition to a zero carbon future!
Speculative Science
Isaac Arthur - This channel focuses on exploring concepts in science with an emphasis on futurism and space exploration, along with a healthy dose of science fiction. While we explore many concepts and technologies that are far beyond us now, we try to keep everything inside the bounds of known science or major theories.
Analytical Tech News/Stories
TechAltar - Analytical videos about tech companies [and their products or services].
Tech Business/Economics/History Video Essays
Asianometry - One of my favorite YT channels. He does a great job producing high quality videos about tech history, tech related economics, and sometimes dives into what that latest tech is and how it might play a part in our future.
Humorous Business Journalism
Good Work - “Edge-cutting” business journalism, with a healthy dose of humor mixed in. Actually covers things that you might want to know more about in the realm of business, trading, and why the American economy is so freaking weird.
The Making of a Movie/TV Show
It Was A Sh*t Show - Making stuff is hard, especially in the entertainment world when there are millions of dollars on the line. And we are going to talk about these disastrous, never ending, and sometimes dangerous productions. With video documentaries and a companion conversational podcast, It Was A Sh*t Show is an entertaining look at some of your favorite films and tv shows, and why they were such a nightmare to make.
Frame Voyager - Mini-documentaries on films without the clickbait negativity.
Mini/Full Documentary Makers
Peter Dibble - Obscure history from the Pacific Northwest and beyond. I recommend checking out America’s First Cross-Country Auto Race.
Kirby Ferguson - He’s best known for his documentary series called, Everything is a Remix. He made an updated and extended version of it. I recommend it.
This is a fairly niche answer, but Noah Caldwell-Gervais.
He does very smart critical analysis of video games as a medium, often in multi-hour long retrospectives of entire franchises. They are all split into chapters, so it’s easy to watch in parts. The visuals and editing are not very flashy, pretty much just footage of the game he’s talking about, but they are so well written and thoughtful I find them extremely compelling. There’s also road trip travelogues, but I’m not as into those.
Love me some Noah