Edu Resources
It contains an overview of almost everything (it’s pretty helpful is you need a quick reference to look up)
- MinutePhysics:
https://www.youtube.com/user/minutephysics
- DrPhysicsA
https://www.youtube.com/user/DrPhysicsA
Feynman Lectures Online:
http://www.feynmanlectures.caltech.edu/