Reproducing codes

Only since the middle of last century has it become apparent that life is intimately connected to the ability of codes to replicate. These codes are variously written in molecules (e.g. DNA and proteins), in memorized actions (e.g. tradition), in sounds (e.g. song and speech), on paper (e.g. text and images), and in digital media. Codes evolve through selective replication, and in that sense play a role which is complementary to that of organisms and cultures.

If the foregoing is true, then we might want to pay attention to the fact that new kinds of codes are easily replicated on the web. In addition to letters for making words, whose replication took a giant leap with invention of the printing press and libraries, and sounds whose replication took a giant leap with the invention of audio recording and radio, two dimensional videos with sound are now recorded and able to traverse the globe in seconds. Although this doesn't change organisms per se, it may change the nature of communities just as circulatory and nervous systems (YouTube for molecules?) changed how individual metazoans get by.

How does this changing picture of code replicability serve to modify the various narratives by which we live?