Recommended YouTube

Biology:
Thought Emporium - DIY Biology, Biotechnology, Biohacking (Omni-God tier)
Journey to the Microcosmos - Microbiology, Micro-zoology
Life in Jars? - Microbiology, Micro-zoology
AntsCanada - Epic Ants
Institute of Human Anatomy - Human Anatomy
Ihm Curious - Biotechnology, synthetic biology essays
The Backpacking Biologist - Random biology
Real Science - Biology heavy essays

Chemistry:
NileBlue - DIY Chemistry
NileRed - DIY Chemistry
Thy labs - DIY Chemistry usually organic
Explosions&Fire - DIY Chem
Explosions&Ire - More educational DIY Chem (second channel)

Biology Science Education and Essays:
Scishow - New and interesting science essays (Omni-God tier)
Sciencephile the AI - Everything science essay (God tier)
Steve mould - Random science shit
Vsauce - Brilliant, usually physics, science essays (God tier)
Big think - Not all science but some great science essays

ScienceClic English - Physics heavy, theoretical science essays
Veritasium - Physics and math heavy science essays
Minutephysics - Physics short essays
The Space Race - Astronomy and Rocket-science essays
Kurtzkesagt - Astronomy heavy, scenario, theoretical science essays (God tier)
PBS space time - Astrophysics essays
Cool worlds - Astronomy (God tier)
Real engineering - Aerospace engineering etc.

SubAnima - Brilliant Bio science essays (God tier)
Real Science - Biology heavy essays
Ihm Curious - Biotechnology, synthetic biology essays
The Backpacking Biologist - Random biology

Professor Dave Explains - Education oriented, information packed
Wacky Science - Dense natural science essays

Dirty medicine - Medicine, education oriented very information packed
Institute of Human Anatomy - Human Anatomy
Ninja Nerd - Medicine, Biochemistry etc. essays
Wayne Breslyn - Education, Organic chemistry Godsend
Crash course chemistry - Education chemistry
Sciencesketch - Basic animated science videos
The Organic Chemistry Tutor - Education, Organic chemistry Godsend
Cognito - Basic science educational essays

Other stuff:
John Michael Godier - Theoretical science backed SCI-FI futurist stuff?
Isaac Arthur - Similar to John Michael Godier, unfortunately politically biased
Melodysheep - Science backed micro-movies (Omni-God tier)