I regularly post YouTube videos on my Outsidetheblocks YouTube channel. When I first started developing in Minecraft Education, there were very few video tutorials available for Minecraft Education, so my channel is specifically designed for this edition of Minecraft, and is designed for educators and students. 

My friend maintains their own YouTube channel, Fantasia Techcraft. It's mostly dedicated to Minecraft Education tutorials; if you can't find what you're looking for on mine, head on over here. 

I strongly encourage every Minecraft builder and enthusiast to create their own "Minecraft Encyclopedia" in Minecraft; a record of every device, technique, command block or redstone mechanic they've learned and created. There is a wonderful complexity and versatility to these things in Minecraft, but it does make it rather difficult to remember all the details, all of the time! A world where you keep examples that you can reverse engineer, or experiment with will be invaluable to you. I am happy to share mine with anyone, just connect with me to ask! 

Flatville started out mostly as a build example world to demonstrate to teachers what kind of builds and structures could be built in Minecraft, along with a Museum (I called it the Musarium) dedicated to basic redstone and command block setups. These days I typically use it for games of Hide n' seek with my student groups or for virtual field trips. In addition to a museum, Flatville also has a public school, a farm, a castle, a city hall, a jail, several shops and restaurants, an abbey, a block of flats, a monorail system and station as well as a full sized replica of the Great Pyramid of Giza.  

It's available to anyone who asks!