It's more or less a rite of passage to share these Youtube videos whenever the topic of Linear Algebra comes up: https://www.youtube.com/playlist?list=PLZHQObOWTQDPD3MizzM2x...
In my opinion, the latter is one of the best math courses available on YouTube, and definitely deserves more views.
Klein's books is very heavy on symbolic manipulation and not much (geometric) intuition. I still think it's worthwhile because of its CS applications. But someone wanting to learn LA can easily get discouraged.
I would suggest one do both the book and the 3blue 1brown series. The former is the bread, the latter is the jam.