Plug in the computer and turn on your P4 automatic disk. There are no video files in it, are there? Find the file or tool in the menu bar at the top of the file, and then select the folder option. Find and select the hidden file to display, and put or remove the check mark in front of it! Can you tell by watching the video? Then select the point attribute of the video file and remove its hidden system attribute, so that it is no longer hidden, and then follow the above process to make the computer not display the hidden file.