Art of the Problem | How Recommender Systems Work (Netflix/Amazon) @ArtOfTheProblem | Uploaded 4 years ago | Updated 9 hours ago
The key insights behind content and collaborative filtering (Matrix Factorization). How Amazon, Netflix, Facebook and others predict what you will like.

Paper in this video:
Matrix Factorization Techniques for Recommender Systems
https://www.inf.unibz.it/~ricci/ISR/papers/ieeecomputer.pdf