・When using mp4 files in games, etc., 　I think they are often looped, but 　the transition from the last frame to the first frame 　often causes a significant change in posture, 　making it look awkward. ・This tool is helpful in such cases, 　as it can easily generate a video by concatenating a reversed part to the end of the original video. ・You can also specify a clipping range and adjust the playback speed and duration. ・There are various ways to use it, 　and I think it will be useful because mp4 files can be used in the bonus game of the "Image Manager" I made earlier. ・This software will continue to improve usability and expand its functionality, 　and no additional fees will be charged when purchasers update to the upgraded version.