Ok, so it's a very bold claim from my side - but he's done a phenomenal job making fundamental math (and science) lectures accessible, and more so, he does have a teaching style which works for a lot of people. It has been much faster paced, and more concentrated.

As for pure numbers, his videos have a total 1,806,946,640 views and 6M subscribes.

(Sure, there are scientists and inventors that have inspired magnitudes more people to enter STEM over the years)