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Create a new page called Movies.
This will be your main category

Create a new page called Movies/Action
This will be your subcategory

Create a new page called Movies/Action/Terminator
This will be your content entry

Now put the following in the page Movies:
[[TitleSearch Action/(*)]]

As fas as I know you have to do the [[TitleSearch Action/(*)]]
manually for each subcategory you create for Movies, sorry.