They did some great vids with Cliff Stoll, including this one about his Klein Bottles https://www.youtube.com/watch?v=-k3mVnRlQLU

Gets too mainstream though.

Try Mathologer instead

3blue1brown is also excellent

Numberphile lost me with their doubling down on their “sum of natural numbers is -1/12” video.

The analytic continuation of the Riemann zeta function that gets you to -1/12 is such nuanced mathematical trickery, I'm not even sure why so many people incessantly argue it one way or another.

Me to, however I forgave them after a great response video by Mathologer.