This phrase is commonly found in the title of a directory listing page. When a web server is configured to allow directory browsing, and there is no default index page (like index.html or index.php ), the server displays a list of files in that folder.
If the above doesn't work, try these modified dorks: Intitle Index.of Mp4 Chennai Express
targets the default header text generated by web servers (like Apache or Nginx) when a folder lacks a standard index.html homepage. This exposes the raw file directory. Mp4 filters the results to show video files. Chennai Express specifies the desired movie title. This phrase is commonly found in the title