I am not a programmer, but need help with a website routine. I have a server that will have a video file (MP4) that has a link on the website. When a user clicks the link, the video plays. If the video is missing, the link will show a JPG file instead. That is, the server will have 2 files, a JPG and an MP4. The user clicks on the link which goes to the MP4 on the server. If the MP4 is deleted, the user sees the JPG. Any help would be appreciated.