Good example of clown being educational is ElectroBoom. He constantly keeps "accidentally" electrocuting himself and goofing around. The videos have very crisp editing and baity thumbnails. At the same time a lot of the content is deeply informative and educational.

I'm not sure you can call his series a curriculum, yet I think I learned a lot more from there than from my university classes, despite watching it primarily for the fun and not for learning.