How does Netflix Use Big Data to Improve QoE?

Nirmal Govind, Director, Streaming Science & Algorithms, Netflix, explains how "we use big data for deep analysis and predictive algorithms to help provide the best experience for our members ..  the types of problems we're solving [I am quoting 2 of the items]

Understanding the impact of QoE on user behavior

To improve the streaming experience, we look at QoE metrics that are likely to have