No logic at all.

Let's assume that all 20 codes were originally within videos or references to the outside world (da vinci).

All of the codes since the clues started were related more to the clue themselves, than the original videos.

Can you spot any reference within videos to those codes?
Frankly, I can not.

I may be wrong, but it looks all of them where invented at some later point.

Exception from terms:

BTW: the guy who broke it claims he googled for n9 and design. With google customized search, all of us would see different results. Thanks a lot nokia.