'Black Mirror' Interactive Film: Inside the 2-Year Journey of 'Bandersnatch' (THR)
https://www.hollywoodreporter.com/live-feed/black-mirror-bandersnatch-netflixs-interactive-film-explained-1171486
This is a long article describing how the interactive aspect works. I've heard there are 5 endings, but the are millions of possible ways to get there. It would help if they included a simple decision graph (flowchart,map) instead of just the verbal description.
This makes it difficult to pirate, but one version I found was 5 hours. The online version takes from 1:30 to 2:30. You can watch a default version by ignoring the questions.