http://www.youtube.com/watch?v=4oVEgfvQMw0I think what was happening was that HD was not turned on on the Youtube page. However, I'm now exporting the movies from Aperture 3 as 720 seems to work ok. But the compression is the issue, so what is the best way to upload an HD timelapse to a website, without using Youtube or Vimeo........ in other words a stand alone movie clip in HD on a page?