An "Index of" page is a server-generated list of files. When a web server (like Apache or Nginx) doesn't find an index.html file in a folder, it often displays the raw directory structure instead.
Then, the man in the video turned around. index of mp4 install
Click on the link. If the directory is still open, you will see the raw listing. Right-click any MP4 file and select "Save link as..." to download. For multiple files, use a browser extension or command-line tool like wget . An "Index of" page is a server-generated list of files