"Everyone has one. But this isn’t straightforward."
[UPDATE] "Following up on yesterday's clue..He’s not Mr. Bickle."
[UPDATE] The clue is referring to the name of the taxi driver which is on his jacket. His name is HAROLL (I really don't know how someone guessed this, video is very blurred even at 720p) and the code which is not straightforward according to the clue is 'LLORAH'