Essence of linear algebra [1] , in 3blue1brown youtube channel totally changed my perspective on Linear Algebra. One of the best channels in YouTube I have seen so far. He makes his videos using the animation engine [2] he built himself.
That whole channel is amazing! I can start just listing all the videos by virtue of picking out awesome ones, but check out the one he did on Euler's formula[1]. Blew my mind.
I didn't know pretty much anything about linear algebra, but by watching the series, I felt deep enlightenment. Also, the videos they have done about topology really made me believe everything is, in essence, geometry.
[1]https://www.youtube.com/watch?v=mvmuCPvRoWQ&t=385s