I've always find C.P.G. Grey's talks interesting. I've pretty much watched all of his vids: CGP Grey - YouTube Another great one is Vsauce channel. There are apparently vsauce2 and vsauce3 by others but vsauce was the most original and informative so far: Vsauce - YouTube I've also discovered the Dilbert TV episodes uploaded by dogbertfiles and they are good too (look for the full episodes which were about 22mins long): Dogbert files - YouTube There was also an interesting channel by TommyEdisonXP, who was born without sight and shared his insight into life related to a blind person. A warm and jovial, good humoured fellow with interesting things to say: TommyEdisonXP - YouTube That's currently it off my head. Do you have channels that you think is interesting?