Options Indexes should do the trick. Is your DocumentRoot /shares/Public/Shared Videos/Movies ?
Can you see http://myMBL:8080/_MyMovie.mp4_ ?
If you used the example DocumentRoot in the second post, create a symbolic link to your /Shared Videos/Movies from WWW/My-WWW
cd /shares/Public/WWW/My-WWW
ls -s /shares/Public/Shared Videos/Movies Movies
Then http://myMBL:8080/Movies will give a list
This is what I would do to keep all my Public shares from the Web just show the Movies.
