> For any real learning use books and other reference materials. Different people at different times and under different circumstances; and different teachers

> For any real learning use books and other reference materials. Different people at different times and under different circumstances; and different teachers with different methods can all impact the best medium to engage with content or learn things. I'm happy you've found what works for you. At the same time, I'll continue to consider YouTube a viable source of educational content when I find it the appropriate medium for such, which is often. Honestly, the real loss to educational content has been the loss of dislike metrics, which can very effectively tell you if content is valuable or not in the education space. At least it's been partly replaced by a "users viewed here" histogram, which can be a true help.