Steganography is the practice of hiding secret message or private information within other multimedia data i.e. text, image, audio or video. Recently video steganography has become privilege for providing large amount of data to be transferred secretly. Video is simply a collection of images, hence more space is available for hiding of information based on factors such as carrying files, type of message to be embedded and method of compression used etc., the technique used in video steganography can differ. The strength of Steganographic technique lies in its capacity to keep the message as secret as possible and also the amount of data that can be hidden, as large as possible. In spite of the fact that numerous approaches already exist in video steganography researches are going on in this field. This paper gives a survey on the methods used in this area.