The video loads from YouTube only after you press Play.
A 14-minute video by Numberphile about recreational mathematics, on the Mathematics shelf. A commenter in r/CasualConversation recommended it.
Numberphile, Video, 14 min, 2016, on the Mathematics shelf
The Josephus problem and its binary solution.
8 min
How to Figure Out the Day of the Week For Any Date EverBe SmartRecommended in r/CasualConversation
21 min
How Many Holes Does a Human Have?VsauceRecommended in r/CasualConversation
5 min
The most unexpected answer to a counting puzzle3Blue1BrownRecommended in r/CasualConversation
13 min
What's The Largest Sofa That Can Fit Around a Corner?Up and AtomRecommended in r/CasualConversation
18 min
a better way to countjan MisaliRecommended in r/CasualConversation
20 min
But what is the Fourier Transform? A visual introduction.3Blue1BrownMentioned in r/ElectricalEngineering
13 min
Why slicing a cone gives an ellipse (beautiful proof)3Blue1BrownMentioned in r/3Blue1Brown
22 min
Group theory, abstraction, and the 196,883-dimensional monster3Blue1BrownMentioned in r/compsci