Thanks for sharing this. It's based on his new book: https://www.amazon.com/Linear-Algebra-Learning-Gilbert-Stran...
There are just two reviews on Amazon, one 5* and one 1. The 1 said "The book resembles a set of somewhat incomplete and somewhat disorganized lecture notes prepared by a course instructor as a rough outline of the content of his course."
That put me off buying it. So more data points would be helpful!