>>11413583YouTube is your one-stop site. The following are some science YouTube channels that I like. I tried to break them down by their content/category. There are many others, but here are just a few.
For Electrical Engineering:
ElectroBOOM, GreatScott, any arduino DIY stuff.
For Chemistry and experiments:
CodysLab, NileRed, The Thought Emporium, Sixty Symbols.
For Math and Geometry
"3 Blue 1 Brown" and Zach Star. Also Numberphile, Mathologer.
For Mechanisms/Engineering:
AvE - canadian guy who takes apart power tools and discusses the materials used and how they work and how the parts are made and shit.
There are others, such as Smarter Every Day, Veritasium and VSauce to name a few, which cross categories more. Hope that's useful to you a bit.