...interlace vs. progressive...
Please, no. Interlacing doesn't have the same nostalgic effect as a 24fps frame rate, and only serves to lower video bandwidth for devices that can't handle a progressive image at the desired frame rate. It's a tradeoff between vertical and temporal resolution that works well for limited technology because it preserves the sharpness of still images. Basically everything except broadcast TV can handle 1080p60, though, so let's let the hack die.