You can sort your own film collection according to different criteria. Title, duration, etc. Isn’t it possible to sort the list by last seen? This would give you an overview of which films from your collection you don’t watch (anymore).
I’ve actually looked into this before, but couldn’t get it to load with enough performance. It would involve combining 2 sets of data, then sorting it, which is unfortunately too much to process in real time.
I Understand. Thanks for the Information.