YouTube is actually interesting. They attribute their rise to a few building blocks: http://www.youtube.com/watch?v=nssfmTo7SZg http://www.youtube.com/watch?v

YouTube is actually interesting. They attribute their rise to a few building blocks: http://www.youtube.com/watch?v=nssfmTo7SZg http://www.youtube.com/watch?v=nssfmTo7SZg I wouldn't put all of these as some sort of future stack building blocks, but there were enough things there that made something possible, that wasn't possible before: easy video sharing. 1- broadband in the home 2- emergence of flash, so no codecs required 3- proliferation of digital cameras 4- cheap hosting 5- one click upload 6- ability to share embed