There's a thread in General Photography for the photography channels. But YouTube is such a big weird universe, so photography can't be the only topic people are interested in.
When I was restoring a canoe, I was looking for videos on steam-bending wood. I found this channel, a guy who restores old wagons. Besides bending wood, he does other woodworking, blacksmithing and tool making.
EngelsCoachShop - YouTube
I read a lot about wooden boats, and several channels are building sailboats. These projects span years so the progression is interesting. There are too many to list, but a short sample:
Acorn To Arabella - YouTube
These two guys decided they could build a wooden sailboat and take it on adventures. First step, cut down some trees. And if they made it interesting enough, people would watch and support them enough to quit their boring jobs. They got that to work and are a couple of years into the boat.
Sampson Boat Co - YouTube
Leo is restoring a 109 year old sailing yacht. I started watching these thinking poor Leo was completely over his head and the project was impossible. He just doesn't reveal how talented he is right away. One talent is finding someone who happens to have an unused giant boat workshop to lend to Leo where he can park his 48ft boat for several years. And live there.
I like woodworking and boat woodworking is fascinating to me, but say you are more interested in steel, and something bigger. But still an approachable DIY project that anyone could tackle. You need to meet Doug Jackson:
Building a 74ft Steel Sailboat - YouTube
Doug is building a 74-foot steel sailboat in his front yard. In Tulsa, Oklahoma. In last week's video, he found out it currently weighs 55.5 (imperial) tons, enough to see the ground displace when he jacks it up and sets it back down. You can see it from Google Earth. It has fiberglass dragons and mermaids on the side. Doug has 11 years of videos just on this boat, plus a couple of submarine builds, remote operated exploration vehicles and other side projects for the boat. He welds a lot, casts metal, gets many other people to work with him and has a lot of "don't try this at home" moments.
If boats are not your thing, maybe cars? Like the boat ones, I prefer long running projects.
Bad Obsession Motorsport - YouTube
These guys are building a Mini (old one) with a Toyota Celica 4wd drivetrain. They end up making most of the parts themselves. A lot of the work is stuff glossed over or never done in other car building shows. One highlight of the series is when they built a cardboard model of a ventilation system, which was 100% functional. They have other projects, such as a former bookmobile being rebuilt to transport the Mini to rallies. They aren't making a video a week like some others, but the videos are really good.
What are your channel suggestions?