1. A method of watermarking a video, the method comprising: generating three or more pilot signals; generating a watermark; embedding the three or more of the pilot signals in a first set of frames of the video according to a pilot just-noticeable-difference (JND) model; embedding the watermark in a second set of frames of the video according to a watermarking just-noticeable-difference (JND) model, the second set of frames being non-overlapping with the first set of frames.