So I talked with Apple, and we were able to work out that the stabilization feature in iMovie was causing some of it. I’m still getting grain, mainly in solid colors, almost like the pixels are having a hard time interpreting the color. I’m also getting pretty bad motion blur when I pan the camera, this thing is supposed to shoot at 60 fps. I’m seriously getting sick of this. I’ve tried final cut, which apparently produces a better image, but it crashes every time.