For me: 1.) Cicada 3301 - Lemmino [17:53]: https://www.youtube.com/watch?v=I2O7blSSzpI
2.) Why gravity is NOT a force - Veritasium [17:33]: https://www.youtube.com/watch?v=XRr1kaXKBsU
3.) The cost of Concordia - Internet Historian [48:48]: https://www.youtube.com/watch?v=Qh9KBwqGxTI
4.) Fast inverse square root - Nemean [20:08]: https://www.youtube.com/watch?v=p8u_k2LIZyo
5.) The dark side of the Silk road - Barely Sociable [1:14:45]: https://www.youtube.com/watch?v=GpMP6Nh3FvU
Sorry, i’m a nerd. If you are not: only watch no. 3; it’s funny.
I totally forgot to mention Deev’s talks in my answer. I have watched most of them several times, and enjoy the different versions/twists on talks he’s given on elevators such as Elevator Obscura: Hacks and Curios in the Lift Industry vs Pit/Penthouse. Great stuff.