We propose a technique for quickly and easily choreographing a video of an amateur performer by comparing it with a video of a corresponding professional performance. Our method allows the user to interactively edit the amateur performance in order to synchronize it with the professional performance in terms of timings and poses. In our system, the user first extracts the amateur and professional poses from every frame via semi-automatic video tracking. The system synchronizes the timings by computing dynamic time warping (DTW) between the two sets of video-tracking data, and then synchronizes the poses by applying image deformation to every frame. To eliminate unnatural vibrations, which often result from inaccurate video tracking, we apply an automatic motion-smoothing algorithm to the synthesized animation. We demonstrate that our method allows the user to successfully edit an amateur's performance into a more polished one, utilizing the Japanese sumo wrestling squat, the karate kick, and the moonwalk as examples.