Instructions on how to open

Keypad on Door:

-Open as of Season 5: This video/code was released on Day 1, August 14: On Tape 1961-62 (Green Dot)
-Code: 49285163

This is part of a massive community effort all started off by activision with clues leading to this website:- https://pawntakespawn.com/tv
A good explination of this was made in a video by JackFrag :- Video

Inside you will find:-
Once inside, they discovered a variety of files and documents depicting an assortment of puzzles — including a venona cipher. These documents set the stage for future clues.

I also Took Screenshots of what looks like Puzzles/Clues to a BIGGER puzzle, see below:-