Angela Collier (Youtube & Nebula) for physics and general nerdery and occasional rants, and Benn Jordan (Youtube) for… uh… I don't know how to describe what he does exactly. Everything from music production to weird experimental microphones to using adversarial methods to confuse AIs.
Edit: oh and styropyro (Youtube) for stuff that'll make you go "holy shit I'm not sure that's a good idea"