Main post link -> http://physicsgalaxy.com/
I use a website called PhysicsGalaxy for learning new concepts. The teacher who gives the lectures, Ashish Arora, has years of teaching experience at various coaching centers in India. His teaching style is easy to understand and not very long or drawn out like Khan Academy feels to me for some topics. He covers all topics required for most engineering entrance exams and he has also coached many students preparing for Olympiads. I would definitely recommend this site. Anyone already using this site?