"parent directory" (mp4|mkv) "index of /movies" -inurl:(jsp|php|html) Why this works:
When a web server (like Apache) doesn't have an "index.html" file to display a pretty webpage, it often defaults to showing a plain list of all the files in that folder. These lists usually have the title "Index of /" and a link to the , which is the folder one level above the current one. The Secret Formula for Better Movie Searches index of parent directory movies better
If you want, I can generate: