So I have an old iMac with iMovie 6.0.3. I made a project using manly sd video from my old sd camcorder. I also put in some high-def clips taken with my cybershot waterproof 5 at the highest quality settings. I burned all the video as one project onto a dvd, played it on a dvd player hooked up to a high def tv. When the clips from the cybershot play, am I watching High-def video? Is it downconverted sd video? Is it some bastardized in-between?