Blockchain & Bitcoin Training - The Basics

I've just come across this set of 5 excellent short videos by @jetiknight which I believe give a very good introduction and foundation for learning the basics of Blockchain & Bitcoin. Even if you're not a newbie, you might learn something new....

https://www.youtube.com/playlist?list=PLwqRAtE0UGOmFSE718ZAZ2su9zg_xlAoS