I have another video series ready from Packt Publishing named Build Complex Express Sites with Redis and Socket.io. This course builds on the foundation from the other course I built for Packt Publishing earlier this year, The Complete Guide to Node.js.
It starts off by covering what and why of Redis. Then goes to building Express sites using Redis. After that, the course jumps to using Socket.io to build real-time sites. Just like Redis the course begins simple and covers what Socket.io is. The course finishes up building sites in Express utilizing Socket.io.