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Abstract: The dynamic growth in communication technology and use of Internet has greatly facilitated data transfer. However, such open channels have greater vulnerability to security threats causing unauthorized access of information. Although, encryption is used for providing security to communication channels yet once decoded valuable information is unprotected. Steganography is the art of communicating in a way that hides the existence of the communication. Valuable information is firstly hidden in a host data, such as text, digital image, audio or video, and then secretly transmitted to the receiver. This paper gives a review of video steganography and the various techniques that can be used for hiding valuable information in video cover media.