I have watched the video and followed the instructions to a tee, but I am not seeing the fields show in the edit or create forms.
What is really strange is it doesn't appear that the Page create/edit screens are using the partial views from itself. When I make any change to Page->Resources->views->admin->partials->create-fields.blade.php directly I don't see the change in the form at all. Even adding a <h1>Hello World</h1> won't display. I can even delete the partials from the Page module admin views and clear all caches and the page still loads with the default form.
I am slightly mystified by how the create and edit forms load the HTML, I am confident it isn't from views->admin->partials. Which is where the code to look for settings in the config for custom fields lives.