makigas EDU was a spin-off project I started developing in 2015 to produce educational content not related to programming, such as screencasts on Maths or Physics. A few pilot episodes went live in order to test whether the project had future. It turned out, the answer was no. There is a Lineal Algebra playlist on my main channel that is more successful than what I expected.
Nos Gusta Linux was a separate channel I used to maintain with tutorials and reviews on GNU+Linux distributions and software. Continued negative and harrassing coming from parts of the community forced me to pull the plug in March 2017 and shutdown the channel. There is still a blog, though.