You can save a Matplotlib animation as a video file using the animation.save method. This method takes the filename of the output video file as its argument, along with some additional parameters that control the format and compression of the video. For example, to save an animation as an MP4 file with H.264 compression, you could use the following code: animation.save('my_animation.mp4', writer='ffmpeg', fps=30, codec='h264')