[colmvp]

While I think 3b1b video's are great for developing a better understanding of the purpose of certain concepts, I don't think there's any way around ignore manually doing the problems with say Strangs Linear Algebra book since that's where you spend tim trying to apply these concepts to problems.

[siddboots]

Agreed. Nothing beats practice when it comes to math. I know that I spend far too much time watching course videos, and no where near enough working through problem sets.

[id_rsa]

Working through some of Strang's problems has also helped me. 3blue1brown is a great introduction to give you intuition, but you cannot commit the skills to long-term memory without struggling through problems.