In this paper we describe specific application of digital watermarking: Video watermarking for Copyright protection. Literature survey suggests that most video watermarking techniques use static 3D Discrete Cosine Transform technique. In this paper, we show the result of implementation of static 3 D DCT. We observe that this scheme works well on correlated videos. But it does not take care of scene change in the video. Hence we propose dynamic size 3D-DCT technique (by "scene change detection") for embedding binary/ gray scale/ color watermark on a color digital video and compare our results with existing fixed length 3D-DCT technique.
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