How to use the World of Warcraft PTR (Public Test Realm) Tutorial

When I ask people if they have tried out the new changes for the upcoming patch on the PTR, many of them don't know how to access it. A couple of people have asked me to do a video tutorial, so I did. It's actually pretty easy, provided you have the hardware and space. If you can't access the PTR, but want to know what some of the upcoming changes, check out the Public Test Realm Patch Notes here.