One of my new favorite YouTube channels is from Mike Boyd. He picks an interesting skill and goes all-in until he figures it out. His recent video about stacking dice is a great example:
Destin traveled with his kids to see a US world record domino fall. If you like this video, check out the other behind-the-scenes video that he mentions.
Peter Brown is a magician when it comes to epoxy. In this latest one, he experiments with adding fluorescing pigment to the epoxy. The video starts a big abruptly but just stick with it. The end result is really neat.