Welcome, uhh, back ! After a little while, the finale is finally released !
This is a supercut of about 10 final streams (~40h) of the playthrough which contains 50% factory bugfixing, and 50% on spreadsheets & other tools where we bang our heads against the wall trying to solve the puzzle. This (long and detailed) cut includes full solving process, including not only most interesting parts but also some brainstorming, to demonstrate that this was not an easy task, full of various theories/mistakes that were made along the way - along with the one of best eureka moments I had in my life, ever !
As mentioned in the intro, I explain in details how this puzzle works, and I believe this is a unique opportunity to take on such an interesting challenge - so if there is even a slight change you might one day attempt it yourself, please don't watch this - do yourself a favor and go solve it yourself. Because you get only 1 unspoiled opportunity to crack this awesome puzzle in your whole life.