You're explaining what youtube's edge is in the market, but not why nobody else has it; it's an important distinction.

Any company has an edge on any non existent company, because they exist - they have the tools, the infrastructure, the knowledge needed to run the business, all things that the non existent company first has to aquire. Doesn't explain why nobody else can do it! Because things, in general, can be aquired. But clarity did: Youtube has Google. Youtube was able to aquire things nobody else could.

Example: You said youtube needs near unlimited bandwidth. This argument doesn't show me why there can't be a competitor. Youtube's business model seems to pay off, so you should be able to convince an investor to pay you, too, unlimited bandwidth, right? Money is immaterial if you can show that you can make more of it at a later stage.

agreed, but your takeoff point was the technical/tactical, whereas i'm advising a wider perspective, as that perspective easily and commonly leads to mistaken conclusions in isolation (particularly by technologists in this context). to be clear, i tend to agree with the individual points made, but even together, they don't articulate youtube's strategy. that was the missing, and the most relevant, element, even if you allude to it otherwise.