I gave that a test using the PostSpots media sharing website that we use regularly to share various cuts. I encoded a test file at both “Standard”, “iPod”, and “PSP” and uploaded all 3 to PostSpots to see if any would stream with a compressed header.
Unfortunately none of them loaded quickly and I was staring at the Quicktime logo until the video had finished downloading/buffering in the background. So as far as I can tell that is not the option we are looking for.
I will keep investigating but hopefully someone else will be able to chime in with some enlightening information.