What are your favorite (Youtube) video's/documentaries of all time that you can watch again and again? - lemm.ee

For me: 1.) Cicada 3301 - Lemmino [17:53]: https://www.youtube.com/watch?v=I2O7blSSzpI [https://www.youtube.com/watch?v=I2O7blSSzpI] 2.) Why gravity is NOT a force - Veritasium [17:33]: https://www.youtube.com/watch?v=XRr1kaXKBsU [https://www.youtube.com/watch?v=XRr1kaXKBsU] 3.) The cost of Concordia - Internet Historian [48:48]: https://www.youtube.com/watch?v=Qh9KBwqGxTI [https://www.youtube.com/watch?v=Qh9KBwqGxTI] 4.) Fast inverse square root - Nemean [20:08]: https://www.youtube.com/watch?v=p8u_k2LIZyo [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 [https://www.youtube.com/watch?v=GpMP6Nh3FvU] Sorry, i’m a nerd. If you are not: only watch no. 3; it’s funny.