OK, I just watched that interactive Black Mirror episode on Netflix, 'Bandersnatch'?... actually, I played it. You don't just watch 'Bandersnatch'...
I'll do my best to avoid SPOILERS (because... well, I'll explain...) but if you want to go into it cold, avoid the rest of my message.

All I can say is it was a whole bunch of fun. Remember those 'Choose Your Own Adventure' books from your childhood? When you'd reach a page and give you a choice to, I dunno, 'kill the monster (turn to page 37)' or 'make friends with the monster (turn to page 70)'? This is exactly like that, but on TV. Set in the mid 80s, we're shown a young computer programmer trying to make a ZX Spectrum game out of a CYOA book written by someone who went on to murder his wife. He's got mental health problems and is driving himself mad trying to finish the game...
Throughout 'Bandersnatch' you are offered choices as to what you can do, ranging from insignificant choices like choosing what to have for breakfast to whether you can kill someone (and some insignificant choices can have major implications!). The changes are seamless, no buffering, and can lead to a whole bunch of timelines. I spent about three hours watchng / playing 'Bandersnatch' (apparently there's about 5 hours of footage in total) and saw four different endings. Also went down a couple of timelines that were so 'meta' that it made me properly laugh out loud, oh Charlie Brooker and his brilliant sense of humour...

Yes, I know it sounds like a video game, so please, no comments from gamers about 'we've been doing this since the year dot', but never in such a critically acclaimed show like BM.

Apparently, you can just watch it as a film (your device will give you a linear version of the film) but you're missing so much... I loved it and will go back a time or two to see what I haven't discovered yet...
Outside of that, i thought it was a brilliant evocation of the mid 80's and the performances were superb all around. Trailer here...
https://www.youtube.com/watch?v=aodNrGhBQP8Anyway, new non-interactive eps of 'Black Mirror' are going to be available early in the new year, so yay!