A reddit user mapped all the decisions: https://www.reddit.com/r/blackmirror/comments/aa9oym/almost_...
I thought it was pretty clever.
Btw: wasn't BluRay or some format supposed to define an interactive media metafile or virtual machine player format?
And I'm sure Netflix has a media mastering SDK of some sort like Roku and perhaps Hulu. Maybe someone with a jailbroken iPhone will crack open the Netlfix app and figure out how to extract the interactive player, if it's an HTML5 web-app.