In Blair Witch you come across two locks, the second being at the sawmill on a door. The lock code works the same as the previous one found in the bunker, except this lock is easier to crack.
Blair Witch: How to enter the sawmill
Find the paperwork
The code is relatively close to the sawmill; First, you need to go to the building opposite the one closest to the lock. Inside this building you will find red tape on a table, watch it with your camcorder to manipulate the doors of the opposite building.
To start, the door is locked, fast forward the tape to where a man opens it, pause it. Now that you will have access to the sawmill, upon entering the building you will notice that there is nowhere to go. Resume tape; a running man will open another door inside the sawmill, pause the tape there. A room will now be open for you.
Once you enter this room, you can find a note on the typewriter. To find the code, you need to search through the drawers. There you will find a piece of paper with the numbers 3, 3, 2 and 4, this is the code you need to lock the outside.
Return to the door
To enter the code correctly, you must move the first cursor to the third slot, the second cursor to the third slot, place the third cursor in the second slot, and finally place the fourth cursor in the fourth slot.
When the code has been entered correctly, the lock will fall out of the door. You now have access to what is on the other side.