Electronics: https://www.youtube.com/user/greatscottlab
Fun and practical making https://www.youtube.com/user/iliketomakestuffcom
Music theory/guitar: Signals Music Studio https://www.youtube.com/channel/UCRDDHLvQb8HjE2r7_ZuNtWA
Hacking/reverse software engineering: Live Overflow https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w
Cooking: https://www.youtube.com/user/BrothersGreenEats
https://www.youtube.com/user/FrenchGuyCooking
Physics simulations: https://www.youtube.com/user/EugeneKhutoryansky
Science: https://www.youtube.com/user/1veritasium
Civil/structural engineering: https://www.youtube.com/user/gradyhillhouse
More than you ever wanted to know about woodworking. Also some engineering: https://www.youtube.com/user/Matthiaswandel
Engineering: https://www.youtube.com/user/engineerguyvideo
Cinematography https://www.youtube.com/user/everyframeapainting
Electronics: https://www.youtube.com/user/greatscottlab
Fun and practical making https://www.youtube.com/user/iliketomakestuffcom
Music theory/guitar: Signals Music Studio https://www.youtube.com/channel/UCRDDHLvQb8HjE2r7_ZuNtWA
Hacking/reverse software engineering: Live Overflow https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w
Cooking: https://www.youtube.com/user/BrothersGreenEats
https://www.youtube.com/user/FrenchGuyCooking
Physics simulations: https://www.youtube.com/user/EugeneKhutoryansky
Science: https://www.youtube.com/user/1veritasium
Civil/structural engineering: https://www.youtube.com/user/gradyhillhouse
More than you ever wanted to know about woodworking. Also some engineering: https://www.youtube.com/user/Matthiaswandel
Engineering: https://www.youtube.com/user/engineerguyvideo
Cinematography https://www.youtube.com/user/everyframeapainting