Robust watermarks can be used for different applications. Main aspects are robustness, transparency and capacity. In this paper we present a block based video watermark, which is robust against several image processing operations. It provides a high capacity and good transparency. The watermarking scheme enforces a relationship between block averages in groups of blocks to represent the embedded binary message. Furthermore it creates a relationship between chosen coefficients into each block to represent the message redundantly. We present several evaluation results to demonstrate the robustness and transparency of the scheme.