Ask HN: Egghead.io for learning CS

I'm a big fan of egghead.io for learning. However, it focuses on tools, frameworks and languages (mostly web dev) but not on practical implementation of CS concepts.

Is there a good alternative that focuses on these things? E.g. how to implement a quick sort algorithm.

I know there are plenty of videos around, but most of them don't have the same level of conciseness and quality Egghead.