The Amazon Prime app for Apple TV has some great features (e.g.: X-Ray tells you the actors in a scene when you pause) but is the cheapest-looking app I’ve used on any platform in decades.
@gruber@theronster@Waustin There’s something called Amazon Rekognition API that does facial and audio recognition on the film. I’m sure that does the bulk of the work. They may rely on viewers spotting errors to polish it up. https://aws.amazon.com/rekognition/
Machine Learning Image and Video Analysis - Amazon Rekognition - Amazon Web Services
Amazon Rekognition automates image and video analysis for your applications and is easy to implement without machine learning (ML) experience.