The final video (the main one for this post) is the final theory, and is good on it's own, but it was also a fun journey watching MatPat and the Game Theorists try and figure the games out as they came out, so I'd recommend watching the whole playlist:
https://www.youtube.com/playlist?list=PLOl4b517qn8jl4Lw8H8cDrDkGwf1FtC7I
And of course, now that the story is "solved," there's a new image at http://scottgames.com/ that hints at more on 12/22/15 lol.
