A video watermarking method resistant to temporal desynchronization attacks, of the type that comprises a watermark embedding, an attack stage and a watermark detection stage wherein during the watermarking embedding stage, the same watermark is hidden in a number of frames given by the mutual information between them; a temporal redundancy control is modified to hide a watermark in each possible I-frame; and during the watermark detection stage, the watermark extractor takes all the frames watermarked with the same key to extract its characteristics.