Like the title said, I have video recording software that I can capture 720p/1080i video on my Mac. From there, I could export it into youtube ready files (mp4) but I want to edit the clips so I use my iMovie software. Once I export the original file into iMovie the quality is noticeably worse. I uploaded a file to youtube now where I didn't use iMovie and went straight from the original file and exported it to mp4 and the quality is a lot better. Why is this? iMovie 06 is supposed to support HD correct? Do the new iMovie apps support HD better? Can anyone confirm this?