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Security of records through computerized media is of great concern today in light of attacks, abuse or unapproved access of data. Steganography is the ability of concealing message inside a block of multimedia. Video Steganography manages concealing secret data inside a video. Cover video of various formats are utilized in the proposed technique. In this paper the proposed algorithm for data hiding utilizes Round-LSB technique to conceal the secret information in cover video. Data to be concealed and sent is hidden only in selected frames of the cover video, known as key frames to improve the security of the system. Selecting key frames are done using two methods. First, statistical features like kurtosis, skewness, standard deviation and mean are utilized for key frame extraction. Second, is by using fixed threshold. Concealing secret data in only key frames obtained from these methods enhances the security of the algorithm by creating more confusion to the hackers. Hence the proposed system is more efficient for secret communication, as frames in which data is concealed would not be known to hackers. Experimental results show that key frame extraction with statistical features provides better results in contrast to fixed threshold in terms of PSNR and MSE.