Zencoder tutorial skipping certain steps

I’m currently going through this tutorial

What exactly do I need to do where it says:

“Now you need to add a method that will accept notifications from the
Zencoder service to the controller, which I’m assuming is called
videos_controller. (This is also where you’ll have your new, edit,
update, etc. methods for videos, which I’m assuming you are fully
of creating yourself - you will need at minimum new and create actions
you can upload the original videos).”

Unfortunately, I’m not yet fully capable of creating this myself.