1. A method of processing a video on a computing device, said method comprising: at the computing device: receiving the video comprising a plurality of images, each image comprising a plurality of pixels, each pixel having a first color space representation defined in terms of a plurality of color component channels; reformatting the video without converting the video from the first color space to a different second color space by adding, to the color representation of each pixel in a set of images of the video, a new channel (i) that does not correspond to a color component channel of said first color space and (ii) that includes a channel value range that extends to at least a range of values of a color component channel of the second color space, said reformatted video emulating a format of the second color space, wherein the video is reformatted to be processed using a process designed for the second color space; processing said reformatted video by using the process; and outputting the processed video in a third color space different from the second color space.