Thought Emporium: New open-source science every week

Applied Science: Interesting applications of science and technology

Foresight Institute: Guiding technological development towards an abundant future

Numberphile: Videos about numbers

NileRed: Show the natural beauty of chemistry in fun ways

TIK: World War 2 history documentaries

TierZoo: Analyzing biology and ecology as the world’s biggest, oldest video game

Scott Manley: Orbital mechanics and rocket science

3 Blue 1 Brown: Some combination of math and entertainment