"Eli the Computer guy" does some pretty interesting video tutorials on YouTube. He tends to go on and on a bit, but overall he does a nice job of explaining networking basics, how to run cables, use RJ45 connectors - this is very important if you run your own wire - and setting up routers/switches.

Edit: Here's the full playlist of his networking videos https://www.youtube.com/watch?v=rL8RSFQG8do&list=PLF360ED108...