I have a pretty broad interest I believe, though:
preferably a channel which has a high number of videos
and where many of the videos are 20 minutes or above
I'm pretty sure this community can come up with some surprising gems!
Many Thanks!
Most videos are probably a bit shorter than 20min, but they do have several in that range.
Mentour Pilot - a pilot who does air crash investigation videos with aviation safety in mind. There are 100s of episodes at this point and the recent ones are near documentary quality and 45+ mins each.
One of the most famous parkour channels out there. Storror has some great atheletes traveling to cool locations and performing at an amazing level. It's nice to see how urban locations can be used in a different way and how people in the area react to some of the stunts.
Mortismal Gaming - Video game reviewer who will review games after getting 100% Steam achievements. The reviews are typically > 20 minutes.
Primarily focuses on RPG/CRPG games but he is very thorough in each review and seems to be quite fair,no hype it's a proper balanced review. Also he has a ton of Divinity Original Sin 2 content.
Coding projects usually from first principles, really neat to see things like flight sims, font rendering, neural nets, chess bots, or ray tracers being built from the ground up:
https://www.youtube.com/@PosyMusic
KRAZAM is criminally underrated.
https://www.youtube.com/@KRAZAM
This guy is pretty fun too but a bit more zoomy