Alright, so I record online matches from my favorite videogame using a Dazzle and a program called VideoGlide. It records them to normal .mov files which, when uploaded directly to YouTube, look perfectly fine. An example can be found here. However, I've recently taken to importing the movies to iMovie HD, adding music, and exporting them back out. THEN I upload them to YouTube. Unfortunately, a lot of quality is lost when exporting them from iMovie, and they end up looking like this. Basically, I'm left between choosing whether I want music on my videos, or quality. So, what export settings should I use on iMovie for optimal YouTube upload quality?