https://www.youtube.com/user/sixtysymbols https://www.youtube.com/user/sixtysymbols - really interesting and well made physics videos https://www.youtube.com/u

https://www.youtube.com/user/sixtysymbols https://www.youtube.com/user/sixtysymbols - really interesting and well made physics videos https://www.youtube.com/user/flitetest https://www.youtube.com/user/flitetest - fixed wing and (multi)copter builds and flights. Mostly mechanical, electrical, and aerospace. minutephysics, minuteearth, and crashcourse are also great.