In recent years, a number of art works have been published using noise and errors for artistic representation. Many of these have been classified as so-called glitch art, and forming a new trend in media art. Inside of glitch art, there is a technique called datamoshing, made using noise and errors in video imagery. While one can produce a video that can serve as a unique representation of datamoshing, but there is no clarified principle of this technique. In this paper we seek to clarify the control of expression based on the datamoshig technique. In addition, I propose a new software for applying datamoshing to videos and show a some works that have been produced by using this technique, as well as discuss the significances of these works from the perspective of media art.