Keyshot Pro Video Rendering

I'm trying to render a video using keyshot pro, but each frame in the video doesnt look like previous frame (light and shadows slightly change between each frame) which means final video doesnt look like a normal video since shadow and light reflections change between frames. see sample video here: https://youtu.be/gQCZa8VW0ys
need someone experienced with Keyshot to help find a solution