Fantastic article talking the Google Spotlight stories. I was lucky enough to work on the first two. Glen Keane did Duets which is Episode 3 and Justin Lin directed a live action called HELP! which is Episode 4. Also it looks like the two episode I worked on is not only going to be available on Moto X and Moto G since Google kept ATAP when they sold Motorola to Lenovo. So 'Buggy Night' and 'Windy Day' is potentially going to be available on 1 billion Android devices in the future.
Link to article