here's some clues I cant decipher but maybe you guys can.
In the ballerina video when she swipes her leg pause it there is some jumbled up letters in bottom right corner of the wall what look like a signature.
in the next scene when she picks the N9 off the window ledge there is letters carved in the wooden ledge what are hard to see, letters in top Left look like BGR and theres a J in middle of screen with maybe other below.