Video App security

What is md5 ? For this can you please a demo link of video to shown a example. if you able to explain it then after Matraex will move for complete project. Small example 1. video app ==> open camera in your app ==> record video from App ==> fetch video information video time e.g. 15sec ., frame :- 30 fps , bits 2134235, ==> final save in your gallery 1. Viewer App ==> fetch same video just you save in camera gallery ==> fetch video information video time e.g. 15sec ., frame :- 30 fps , bits 2134235 Please note :- md5 should be same of both the App. If you are able to do this , Then after we will move for complete project.