This script will scan through the subdirectories of a directory that
you specify. If those subdirectories contain one or more video files,
and those video files account for 90% or more of the directory's size,
the script will delete everything else in that directory.

This is particularly useful for cleaning up after a torrent has been
downloaded. It will delete stupid nfo files, sample files, readme files,
etc, and leave you with just the video.

-jwr