Professor Leonard (math: mostly lectures) - https://www.youtube.com/@ProfessorLeonard

Math Sorcerer (math: book reviews, lectures, comedy, etc) - https://www.youtube.com/@TheMathSorcerer

PatrickJMT (math) - https://www.youtube.com/@patrickjmt

Up and Atom (science) - https://www.youtube.com/@upandatom

Physics Girl (science) (sidebar: get healthy again soon Diana!) - https://www.youtube.com/@physicsgirl

Last Best Tool (tool reviews) - https://www.youtube.com/@lastbesttool

Torque Test Channel (tool tests: sometimes destructive) - https://www.youtube.com/@TorqueTestChannel

NC Bassin' (bass fishing: mostly on Lake Norman in NC) - https://www.youtube.com/@landonmoore76

3Blue1Brown (math: emphasis on cool visualizations) - https://www.youtube.com/@3blue1brown

Michael Penn (math) - https://www.youtube.com/@MichaelPennMath

EEVBlog (electronics) - https://www.youtube.com/@EEVblog

ElectroBOOM (Mehdi, electronics) - https://www.youtube.com/@ElectroBOOM

Great Scott (electronics) - https://www.youtube.com/@greatscottlab

Marco Reps (electronics, 3d printing, CNC, etc) - https://www.youtube.com/@reps

Sabine Hossenfelder (science) - https://www.youtube.com/@SabineHossenfelder

The Signal Path (electronics) - https://www.youtube.com/@Thesignalpath

Marsh Man Masson (fishing: mostly in the bayous of South Louisiana) - https://www.youtube.com/@MarshManMasson

The 8-bit Guy (retro-computing) - https://www.youtube.com/@The8BitGuy

Ben Eater (electronics) - https://www.youtube.com/@BenEater

Zach Freedman (aka Void Star Labs) (maker stuff - 3d printing, etc) - https://www.youtube.com/@ZackFreedman

Dr. Becky (astrophysics) - https://www.youtube.com/@DrBecky

618 Fishing (fishing: mostly in the lower midwest) - https://www.youtube.com/@618Fishing

Intuitive Angling with Randy Blaukat (bass fishing) - https://www.youtube.com/@randyblaukatintuitive

Reel Hillary Sue (bass fishing) - https://www.youtube.com/@TheReelHilarySue

Scott Martin Fishing (bass fishing) - https://www.youtube.com/@ScottMartinChallenge

Corporals Corner (bushcraft, camping) - https://www.youtube.com/@recall5811

Reallybigmonkey1 (bushcraft, camping) - https://www.youtube.com/@Reallybigmonkey1

Camping with Steve (steve wallis, stealth camping) - https://www.youtube.com/@campingwithsteve

Tibees (math) - https://www.youtube.com/@tibees

The Amp Hour (electronics oriented podcast) - https://www.youtube.com/@TheAmpHour

The Den of Tools (tool reviews and related) - https://www.youtube.com/@denoftools

WranglerStar (tool reviews, homesteading, and "other") - https://www.youtube.com/@wranglerstar

Millis Construction (tool reviews) - https://www.youtube.com/@MillisConstruction

Flammable Maths (math) - https://www.youtube.com/@papaflammy

Stand Up Maths (math) - https://www.youtube.com/@standupmaths

Blackpenredpen (math) - https://www.youtube.com/@blackpenredpen

Louis Rossman (electronics, repair, right-to-repair, apple) - https://www.youtube.com/@rossmanngroup

Profrobbob (math) - https://www.youtube.com/@profrobbob