I'm quite uncertain that goading people based on a stereotypical notion that Americans are map-ignorant is the ideal manner by which to overcome initial resistance to one's proposals. Even if you're idea were a good one and perfectly executed, you still have to practically ram it down people's throats in order to convert them.
HN is not a great place to sell tutorials; video or otherwise. I looked at your site over the weekend, kept it open in a tab as a tickler and then last night decided that buying updated Xcode and Objective-C materials would be both a cheaper and better option. That wasn't based on your experience, lack thereof or price. It was based on my own process and interest in learning, and judging by the number of books people produce and sell on the subjects of programming, I'd say that I'm not alone in that category. You may have picked the wrong audience.
Also, in regards to this post, you've let your dissatisfaction with HN's receptiveness towards your idea get the best of you. One submission and a "lessons learned" follow up post five days later is not a sign that you've externalized negative feedback or that you've been able to collect sufficient data to pontificate over the HN submission process and provide useful advice for others. If anything, you should create a marketing campaign, gather and interpret your data and use it to back up your assumptions.
Either way, I wish you the best of luck with your endeavors. Based on what I've seen so far, you're far ahead than many people your age.
ps. Yes, I've been to Singapore. It's okay.