This Add-on allows Stremio to find a movie/tv episode from many streaming services, including Netflix, Hulu and iTunes. Currently it selects a source in this priority: free, tv everywhere, purchase, subscription.
When Stremio allows settings for Add-ons, you would be able to select which of these types to pick first, or even a particular service (e.g. Netflix) which to pick first.
Currently US and UK supported - will be able to set that up manually through Stremio Add-on settings