I do enjoy Khalid's explanations, and I applaud anyone who is exploring different mediums and methods to help improve education, especially around Mathematics and Computing (my areas of interest).

Other favourites:

https://acko.net/blog/how-to-fold-a-julia-fractal/

https://ncase.me/trust

http://worrydream.com/LadderOfAbstraction/

https://m.youtube.com/user/patrickJMT

https://www.3blue1brown.com/

https://www.redblobgames.com/pathfinding/a-star/introduction...