Okay so i went back and got the good ending. Hats off to the devs for reaching out to explain how to do it. I felt silly for not figuring it out lol.
I saw the video, we appreciate you coming back for the second ending. The extra gamemode doesn't require you to do anything else, you just need to find the shotgun in the apartment. It's a sort of walking simulator future game teaser, if you come back for it on or off video.
If you liked the game consider playing our other games, it's all under the same storyline so far.