[impendia]

I am a math professor, and I try to do a good job teaching. Any topic that 3b1b covers, the video will give a better presentation than I would in a lecture hall!

It is part of our job to lecture, but that's not our only job as an instructor, and I wouldn't even say it's the most important one. Our job is to assemble a coherent course -- typically involving lectures, homeworks, exams, etc. where everything is tied together, and where I try to chart a coherent path through the material, so that the students have learned a subject by the end.

Once I was teaching vector calculus, a subject which 3b1b covers, and I showed a couple short clips in class. I also shared additional links with my students and encouraged them to watch. As instructor I try to make good use of any and all helpful resources which are available, and 3b1b is certainly one of them!

[dingosity]

You clearly don't teach at MIT, where the professor's role is to be a glorified test proctor.