Dear users, I had a video in my cellphone in .mp4 format. I deleted it by mistake but hopefully recovered it through a Recovery Software. The Recovered file and the Original file is of the same size. But the Recovered file does not have any extension. It just shows file extension. I changed its extension to various video types such a .mp4 , .avi , but the video could not be played back . Please tell me what to do. I can even upload the video if you want in filesharing websites.