What are you using for editing software?
On edit, I saw on YT you put a Premier Elements 10 tag on it. I should have remembered.
PE10 gives you two choices. One is to Share>Online>YouTube and there are about 8 preset choices.
I use the other. I create a file optimized for YouTube. Do Share>Computer>AVCHD where there about 25 presets, including one for YouTube HD. That puts a file on my computer and I use the YouTube uploader. It may take longer, but I've had good luck with it.