I've been reading stories of successful founders, I learned that many of them don't quit their jobs or drop out of school until they have acquired a significant audience or customers to reduce their risk. I read the blog post about what your startup is doing, in essence you're competing with YouTube, that's going to be very hard with no audience or customers.
We're definitely not competing with YouTube, but I certainly see your point about getting customers first. It's a valid one, and we were just too miserable in our jobs to wait for that :)