I have been wondering that as well. I have a VERY slow computer, so it takes a long time to both render, and upload in HD. But I do it anyways... It would be very nice if the campaign did that as well.
They just uploaded a Fox News interview in 720p, looks good! But they also uploaded the CNN interview, but that was in 480p. But the big problem was their, "intro" all that it was, was the Ron Paul 2012 avatar sized photo that didn't take up the full screen. It then went pixelated, as a "transition". They REALLY need to work on an intro...