A lot of the channels I like have already been listed (more than once) by others, so I will just mention my top current favorites and few that haven't been mentioned.

• SuperfastMatt -He's a former Tesla engineer that hobby builds custom vehicles like an offroad Dodge Viper and a land-speed car
• HyperspacePirate -he's a guy building his own diy cryocooler while doing all sorts of at-home refrigeration refinement utilizing off the shelf materials.
• Max Miller -He's an educational cook that seems to speak to the former Alton Brown crowd.
• ThisOldTony -He's a pair of machinist hands 🙌 that shows people the fundamentals of how to work with metal while also being entertaining
• Extractions&Ire -He's a mad chemist from the southern hemisphere
• The Thought Emporium -He's an amateur mad bio-engineer who among other things is working to create an array of rat neurons that he can teach to play Doom

Nilered is a mad chemist from the northern hemisphere that also barely makes content anymore so I can't list him

I also love most of the content creators that are apart of Nebula.