Knowledge Was Collected 4
Advent of Code
You know I had to mention this one. It is incredible. Play Advent of Code. As of today we are on day 5 and it is incredibly fun!
Advent of Code: Behind the Scenes
https://www.youtube.com/watch?v=uZ8DcbhojOw
Advent of Code again? Yes.
This is a cool video from the creator of this fun advent talking about behind the scenes: how the puzzles are created and verified.