https://www.youtube.com/playlist?list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab
Instructor: Prof. Gilbert Strang
https://www.youtube.com/playlist?list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab
https://www.youtube.com/watch?v=xyAuNHPsq-g&list=PLFD0EB975BA0CC1E0
Linear Algebra KHan Academy
Go with Strang's lectures if you're good at math and Khan Academy if you want it explained like you're five. I listened to Strang's lectures after taking linear algebra and still learned a lot from them. But when I watched Khan Academy they took several minutes to explain really simple concepts and examples.