CamStudio Taksi ZDSoft ZDSoft is the worst of these three because the video frequently glitches, it\'s low quality, free version only has a month trial period, and it leaves a watermark. However, even the free version allows unlimited video length, it\'s simple to use, and the program itself seems reliable. Of Taksi and CamStudio, Taksi is better, because it AppHooks onto KSP at the touch of a button, has simple Hotkeys, and is simple to use. It leaves no watermarks, and the video is high quality. It has unlimited video length on trial. However, I currently use ZDSoft, because both Camstudio and Taksi are [on my computer] currently only producing videos that my copy of Live Movie Maker says are corrupted. Hence why I have said ZDSoft is more reliable. However, Taksi did work then stopped, so I can\'t be certain about ZDSoft. Go for Taksi for now.