[Cyph0n]

I'm going to use this opportunity to list some relatively unknown yet excellent software dev related channels that I've come across over the years.

* Derek Banas (https://www.youtube.com/user/derekbanas): staggering amount of content on a huge variety of programming topics; tutorial-style; this guy is so productive it scares me sometimes :(

* Mark Lewis (https://www.youtube.com/user/DrMarkCLewis): CS professor; lots of videos on general CS, functional programming; focus on Scala

* VoidRealms (https://www.youtube.com/channel/UCYP0nk48grsMwO3iL8YaAKA): excellent C++-focused content, great Qt series

* mathematicalmonk (https://www.youtube.com/user/mathematicalmonk): great ML and probability videos

* mycodeschool (https://www.youtube.com/user/mycodeschool): general CS, algorithms, data structures

* HandmadeHero (https://www.youtube.com/user/handmadeheroarchive): excellent series by Casey Muratori that explains a huge number of topics related to game dev, gfx programming; has a really long series of videos documenting how he's building an indie game from the ground up i.e. custom engine

I will update once I think of others :)

[malnourish]

Derek has helped me more than once. He was instrumental in wrapping my head around design patterns (and combined with the gang-of-four's and head first I feel like I really learned).

[jbronn]

I had no idea that Mark Lewis was on YouTube! He was one of my favorite professors at Trinity and I'm grateful to know he's still at it and reaching others outside of San Antonio.

[beeeeeebooo2]

Yes! Came here to say Derek Banas. Dude is amazing. Genius level, incredible teacher, the guy was made for this. Came out of lurking just to post this.