Then on next screen the frame rate and video dimensions are there you can change it as your own size then it will show you the total size of the video and if you wanted to compress it press the compress button. 3. On third screen the progress bar will show the compressing of the video and on the below there is a cancel button if you want to cancel the process. 4. On the last screen it will show you the screen where you can see the video before compressing and after compressing and how much you saved the MB while compressing and then there is two options you can delete the original video from the gallery or you can keep the original file.