OK not entirely but by searching steam forums i found out that somehow these strings of pictures a) lead to a bbs client b) give a username and password to use at the client. i don't get how but it does.
once there you get ASCII art
notice anything similar?
yup. this whole code thing are pictures of portal 2. the pictures that were in the youtube video i posted.
so valve went through all this creepy shit as a clever way to announce portal 2. lol