Perhaps these are a bit too popular, but I thought I'd share just in case:

Lasers and stuff, but sane: https://www.youtube.com/@LesLaboratory

Keg rocket! Only two vids but looking good so far: https://www.youtube.com/@KegRocket

Wild electrical motor projects and more: https://www.youtube.com/@OverbuiltByHenry

Interesting 3d printed robots and more: https://www.youtube.com/@harrisonlow

EE prof with lots of educational videos, including guitar pedal circuit deep dives: https://www.youtube.com/@Lantertronics

Practical PCB design, EMC and more: https://www.youtube.com/@MicroTypeEngineering

Lots of great electronic tutorials: https://www.youtube.com/@FesZElectronics

Guitar pedal teardowns and more: https://www.youtube.com/@graybenchelec

Students in the process of making a liquid rocket: https://www.youtube.com/@liquidpropulsiongroup5017/