beginning of the game

[djeddy]

If it's the vent door you mean (Since there is no locked locker in the beginning room)

Spoiler below!

Pick up a coin, use it with the "flat-tool" or what it's name in english. The coin will now be flat, use the coin as a screwdriver to open the vent door.

Thank you. It looked like they were opening the locker on the video.
I apppreciate your help! If you look at the link below, you will see what I mean:

http://www.mahalo.com/Penumbra_Black_Plague_Walkthrough