No, it means that when I have a .htaccess file that tries to test for hotlinked movies I am not able to catch "no referers" because even properly linked movies have "no referer".
Normally I would expect my .htaccess to work like this:
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^
http://.*mydomain\.com*$ [NC]
RewriteRule \.mov$
http://www.mydomain.com/forbidden.mov [R,L]
But it does not work like this because on some browsers I _never_ receive a request with mydomain.com as a referer.
Instead I have to do it like this:
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^
http://.*mydomain\.com*$ [NC]
RewriteRule \.mov$
http://www.mydomain.com/forbidden.mov [R,L]
But this is dangerous because every user entering my .mov URL directly would get the movie.