Because if there's one thing the internet can't stand it's making absolutely any sense at all, this is a video recreating the Game Of Thrones intro with a bunch of timelapse video of different molds growing. People are so weird. It's hard to believe somebody sitting around watching a timelapse of mold growing and thinking to themselves, "I've got it -- I'll remake the intro to Game Of Thrones with these videos!" What's even harder to believe is THEN THEY ACTUALLY DID IT instead of just letting the idea die right there on the spot like every idea I've ever had that didn't involve eating or taking a nap.
Keep going for the video, as well as the original for comparative purposes.