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Video Encryption is the process of converting the video into an unrecognizable form to protect it from unauthorized access. This paper proposes a novel video encryption method based on a dynamic S-box generated using the Sine-Tent cosine chaos map. The proposed method mainly comprises four phases. In the first step, an input video is split into frames, and frame rotation is performed to shuffle the pixels within the frame. The second stage involves the generation of a novel dynamic S-Box by using the Sine-Tent Cosine map. The number of dynamic S-boxes to be generated in the method is equal to the number of frames in a video, as each frame is encrypted by a different S-box. As every time a new S-box is used for encryption, it makes it difficult for the adversary to access the information. Frame padding is used to protect the metadata of the frame, and to make the size of the video frame compatible with the S …