Alphaphoenix - high quality science content that doesn’t feel overly simplified. https://youtube.com/c/AlphaPhoenixChannel

Applied Science - impressive reproductions of existing science https://youtube.com/c/AppliedScience

Stuff made here - impressive maker/engineering projects https://youtube.com/c/StuffMadeHere

Explosions & Fire - (and related channels) Home explosives synthesis. Fun explosions. Notable for it’s honest look at how science works (and doesn’t work). Low production value. https://youtube.com/c/ExplosionsFire2