the most important thing for me in his videos is how he strives to explain the topic from a first principles thinking perspective.

if i had someone explain linear algebra the way he does in his youtube channel, i would have enjoyed and absorbed it much better than I did during my classes. while the professors did a decent job in explaining linear albegra and its usefulness among various topics around us, they did a poor job at explaining how thinking about these topics from linear algebra perspective makes so much sense!

edit: link for those interested - https://www.3blue1brown.com/topics/linear-algebra