Here's my superlist..
Critique of dumb capitalist ideas: Adam Something https://www.youtube.com/channel/UCcvfHa-GHSOHFAjU0-Ie57A
Science/Design Practical: ALEX LAB https://www.youtube.com/c/ALEXLAB
Most awesome demonstrations of DIY science shit ever, dude is a genius, 100/10 do recommend.. Applied Science https://www.youtube.com/user/bkraz333
Material Physics and other Physics stuff: AlphaPhoenix https://www.youtube.com/channel/UCCWeRTgd79JL0ilH0ZywSJA
Model rockets, flight computers and other cool shit (dude builds a landable solid rocket booster, very cool): BPS.space https://www.youtube.com/channel/UCILl8ozWuxnFYXIe2svjHhg
A younger Veritasium/Tom Scott: Atomic Frontier https://www.youtube.com/channel/UCbCq5Y0WPGimG2jNXhoQxGw
Machine shop shit and good humour: AvE https://www.youtube.com/user/arduinoversusevil
Good humor and crazy ideas: Boy Boy https://www.youtube.com/channel/UC_S45UpAYVuc0fYEcHN9BVQ
Interesting sciency stuff, not too technical: Brainiac75 https://www.youtube.com/user/brainiac75
Practical Morons: Allen Pan https://www.youtube.com/channel/UCVS89U86PwqzNkK2qYNbk5A
Material physics, general science stuff, usually on a nanometer scale, dude owns a SEM and some other cool tools. Breaking Taps https://www.youtube.com/channel/UC06HVrkOL33D5lLnCPjr6NQ
South African dude, was an apprentice at Hacksmith labs: Build IRL https://www.youtube.com/channel/UC4gbCGiEov1VAcOFpfGKPiA
Surely everyone knows that hexagons are the bestagons: CGP Grey https://www.youtube.com/user/CGPGrey
Cool chemical reactions in slo-mo ChemicalForce https://www.youtube.com/channel/UCqONNjBkukcc2yXbmHL8niQ
Chemistry vids: ElementalMaker https://www.youtube.com/user/ElementCollector1001
Chemistry vids from a rambling (smart) idiot: Explosions&Fire https://www.youtube.com/channel/UCVovvq34gd0ps5cVYNZrc7A Extractions&Ire https://www.youtube.com/channel/UCvFApMFo_AafXbHRyEJefjA
Very detailed Chemistry videos: NileRed https://www.youtube.com/user/TheRedNile 2nd Channel https://www.youtube.com/channel/UC1D3yD4wlPMico0dss264XA
Chemistry stuff: Thoisoi2 - Chemical Experiments! https://www.youtube.com/user/TheThoisoi2
Crazy medical edge cases: Chubbyemu https://www.youtube.com/channel/UCKOvOaJv4GK-oDqx-sj7VVg
Interesting medical stuff from a cardiologist: Medlife Crisis https://www.youtube.com/channel/UCgRBRE1DUP2w7HTH9j_L4OQ
Impressive redneck DIY projects: Cranktown City https://www.youtube.com/channel/UCQ3KKU5-uaoLyKnGVzv1XNw
Woodworking projects: DIY Creators https://www.youtube.com/channel/UChKlSK39lLg8eZHIX0iVzLA
Crazy high quality DIY projects: DIY Perks https://www.youtube.com/user/DIYPerks
In depth engineering videos focussed around cars: Engineering Explained https://www.youtube.com/user/EngineeringExplained
Optics, dude makes lenses n' shit: Huygens Optics https://www.youtube.com/user/huygensoptics
Australian redneck DIY projects: I did a thing https://www.youtube.com/channel/UCJLZe_NoiG0hT7QCX_9vmqw
Lots of 3D printing, lots of jet engines and turbines: Integza https://www.youtube.com/channel/UC2avWDLN1EI3r1RZ_dlSxCw
Large scale 3D printing stuff: Ivan Miranda https://www.youtube.com/user/superazote
Very in-depth practical game prop DIY projects: JAIRUS OF ALL https://www.youtube.com/user/jairust
Dude hates his life but builds cool robots and shit: James Bruton https://www.youtube.com/user/jamesbruton
Movie and game inspired crazy DIY projects: JLaservideo https://www.youtube.com/user/JLaservideo
Interesting and strange DIY projects: Joel Creates https://www.youtube.com/channel/UCHk0IYEDJxQGQ-nbd3yP_KA
Discussions of science and other weirdness: Kyle Hill https://www.youtube.com/user/ScienceBasedLife
Full Mac repair videos from angry repair man: Louis Rossmann https://www.youtube.com/user/rossmanngroup
Some DIY stuff, not my fav but he's okay: Louis Weisz https://www.youtube.com/user/WeiszCracks
3D printing and other projects: Maker's Muse https://www.youtube.com/user/TheMakersMuse
Heavy technical electronics stuff: Marco Reps https://www.youtube.com/user/reppesis
High voltage electronics: Plasma Channel https://www.youtube.com/channel/UCg45A-ph7Eu8jQgfrwDkHLg
Electronics/DIY projects with an artistic flair: SeanHodgins https://www.youtube.com/channel/UCE-bw6PRKuDlH6fP1mP4nOw
Electronics, 3D printing and other crazy projects: Zack Freedman https://www.youtube.com/user/ZackFreedman
Electronics: GreatScott! https://www.youtube.com/user/greatscottlab
Electronics and bad DIY booze: bigclivedotcom https://www.youtube.com/user/bigclivedotcom
Ozzie electronic engineer: EEVblog https://www.youtube.com/user/EEVblog
Dumbass electronic engineer who likes blowing shit up and shocking himself: ElectroBOOM https://www.youtube.com/user/msadaghd
Your weekly space/rocket reports: Marcus House https://www.youtube.com/channel/UCBNHHEoiSF8pcLgqLKVugOw
Space and astronomy news/info: Scott Manley https://www.youtube.com/user/szyzyg
Dude who does crazy stuff to pianos: Mattias Krantz https://www.youtube.com/user/Mattiaskrantz
Dude who builds useless robots: Michael Reeves https://www.youtube.com/channel/UCtHaxi4GTYDpJgMSGy7AeSw
Minis and dioramas: Nerdforge https://www.youtube.com/channel/UCggHsHce2n3vvbJf_8YKrMA
Thalasso hobbyer ใใใใปใณใ https://www.youtube.com/channel/UCdYAt_kceIuiDwklp0EeIFw
Cool science and DIY stuff: NightHawkInLight https://www.youtube.com/user/Nighthawkinlight
Super interesting socail documentaries: Oki's Weird Stories https://www.youtube.com/channel/UCjDQKxiTVpXutZc2Ra9wCAg
Model planes, drones, rockets, racing cars etc: PeterSripol https://www.youtube.com/channel/UC7yF9tV4xWEMZkel7q8La_w
ProjectAir https://www.youtube.com/user/ThatScienceGuyJames
rctestflight https://www.youtube.com/user/rctestflight
Tom Stanton https://www.youtube.com/user/tomstanton282
RCLifeOn https://www.youtube.com/user/RcLifeOnSimon
Interesting physics stuff: Physics Girl https://www.youtube.com/user/physicswoman
3D printing and design: Proper Printing https://www.youtube.com/channel/UCqfMW0tMZEciSXQym8x0EoQ
Podcast hosted by a bunch of science youtubers: Safety Third https://www.youtube.com/channel/UC7QE72cxiBkiwnvGoFfqYOg
Random DIY projects, like turning a Tesla into a truck: Simone Giertz https://www.youtube.com/channel/UC3KEoMzNz8eYnwBC34RaKCQ
Science and practical stuff: SmarterEveryDay https://www.youtube.com/user/destinws2
Interesting experiments and simple explanations to strange phenomenon: Steve Mould https://www.youtube.com/user/steventhebrave
Crazy engineering by a genius: Stuff Made Here https://www.youtube.com/channel/UCj1VqrHhDte54oLgPG4xpuQ
Lasers and high voltage: styropyro https://www.youtube.com/user/styropyro
Long form DIY stuff with detailed explanations: Tech Ingredients https://www.youtube.com/user/TechIngredients
In-depth explanations and history of technology: Technology Connections https://www.youtube.com/channel/UCy0tKL1T7wFoYcxCe0xjN6Q
Testla coils: teslista555 https://www.youtube.com/user/teslista555
Science and bioengineering: The Thought Emporium https://www.youtube.com/user/TheChemlife
Redneck science: TheBackyardScientist https://www.youtube.com/user/TheBackyardScientist
3D Printing: Thomas Sanladerer https://www.youtube.com/user/ThomasSanladerer
Dude who tells you about interesting things and places: Tom Scott https://www.youtube.com/user/enyay
Ozzy redneck DIY: Turnah81 https://www.youtube.com/user/Turnah81
DIY projects and fabrication: Tyler Bell https://www.youtube.com/channel/UCL0FT83RjTWCmc6n9lLojmQ
Interesting theory, math, physics and science subjects: Veritasium https://www.youtube.com/user/1veritasium
Insanely detailed miniture mechanical projects: W&M Levsha https://www.youtube.com/channel/UCLt9kIslIa1ffiM8A04KORw
Dumb but entertaining DIY stuff: William Osman https://www.youtube.com/channel/UCfMJ2MchTSW2kWaT0kK94Yw
Fun videos and skits:
Chris and Jack https://www.youtube.com/channel/UC3Liv5-jdU2Qk53lTtYDG2w
Matthew McCleskey https://www.youtube.com/user/foreignduckslap
MattColbo https://www.youtube.com/channel/UCDyqjn-9rKdcAe0gTMAkqyg
Joma Tech https://www.youtube.com/channel/UCV0qA-eDDICsRR9rPcnG7tw
Gus Johnson https://www.youtube.com/user/gustoonz
Goat-on-a-Stick https://www.youtube.com/channel/UCDyR_C_QVjZR24ze0fl5S_Q
brian david gilbert https://www.youtube.com/channel/UCakAg8hC_RFJm4RI3DlD7SA
FilmCow https://www.youtube.com/user/SecretAgentBob
Max Fosh https://www.youtube.com/channel/UCb31gOY6OD8ES0zP8M0GhAw
Lee Hardcastle https://www.youtube.com/user/leehardcastle
Joel Haver https://www.youtube.com/user/MakingShorts
Steven He (emotional damage) https://www.youtube.com/channel/UCP0_k4INXrwPS6HhIyYqsTg
Trent Lenkarski https://www.youtube.com/channel/UCiAj9NhvUTfNaq4YwOHGEyA