it's the end to the link of a youtube video!
https://www.youtube.com/watch?v=2FTp3SlilA0 it has some interesting easter eggs within the video that are pretty cool. :3 if ur more interested u can simply look at some reddit pages and find some theories.
for good ending three u have to choose the option "I want to follow him" after letting the timer run out and running away with him on day 7