Historically, datamoshing was an undesirable effect, caused by errors with video compression. This results in what we call the datamoshing effect. However, if the d-frames become corrupted, or if the i-frames get removed, the pixels onscreen will move in some extremely glitchy ways. The d-frames are much more efficient for video compression since they store only pixel movement data rather than an entire image. I-frames are essentially a complete image of a video frame, whereas d-frames are comprised of where pixels from an i-frame need to move to. Compressed videos contain i-frames and d-frames.
In short, datamoshing messes with a video’s compression, causing the pixel information to become corrupt.
