Wait long enough and things will appear new and magical. My point is merely that any invention is still the gradual accumulation and unique combination of previous ideas (and so forth). Even if you lack the knowledge about how something came to be it does not change the fact that: Everything is a remix.No one disagrees that all inventions build upon older ideas and inventions.
Your attempt to redefine what the word "new" means in the realm of inventions doesn't logically prove anything. It's just kind of a semantically-induced logical dead-end.
A confluence of events if you will.
This reminds me of arguing with a Creationist about the statistical likelihood that DNA would have assembled randomly from the primordial ooze. They claim that man must have been "created" because of the statistical unlikelihood that base chemicals would just randomly assemble into a living creature. Their arguments always ignore the electro-chemical and evolutionary forces that drive the "confluence" and turn it from a random coincidence to a statistical likelihood. Likewise, you appear to ignore the drive of the individual inventor in assembling and delivering pre-existing technologies.
Were the technologies unavailable to make YouTube before it was made? No. What was new was the assembly of those technologies at the proper time when they could be supported by the environment. As individual technologies, nothing was "new". As a whole, it was definitely new.
Once again, I perceive your argument as an exercise in semantics to denigrate the new by redefining "new" in order to make some larger argument about the incremental contribution of inventions made by inventors. In order to reach your same conclusions, one would have to pretend that there was no novelty in the way that pre-existing things were assembled.
There are negligibly few atoms on the Earth that weren't here 4 billion years ago, yet I doubt you'd argue that nothing new has appeared on the Earth since then.
[Edit: Clarified the Creationist point]