First show how, then maybe explain. In this lesson I now show, link the VueRx library and rxjs together by Vue.use, the VueRX plugin and then pass in RX. This way, I've shown you exactly what to do. Too often people get caught explaining before showing, where you would say, "Now I need to link together this VueRx plugin and rxjs."
So I'm going to go ahead and type out Vue.use. You can see that that introduction or explanation beforehand is unnecessary, because when you show it, oftentimes simply showing is self-explanatory.
Or after you've shown it, you can go into a bit more detail by highlighting a certain piece and saying, "This is the typical approach of registering a plugin with Vue," or something like, "This allows the flexibility to use other Reactive libraries." Save those explanations until after you show how to do it.