@yosypia– Welcome to the Piklist Community!
“Posts to Posts” saves the data to a custom table and makes it easy to pull that relationship, both ways. If you only need a one way relationship you can just save the data using any Piklist field.
You can absolute create the field you uploaded. Please let us know what type of data “movie” and “role type” is and we can help you build this. For example, is “movie” a post type?