I put a RewriteRule in htaccess and this does not work like that when you go to "file/123/1234.mp4" redirect to "http://123.otherdomain.com/file.php?f=1234".
This is my htaccess
Options +FollowSymLinks +Indexes
RewriteEngine On
RewriteRule ^/?file/(.*)/(.*)\.[mp4|m4v|ogv|webm|acc|mp3|m4a|ogg]{3,4}$ http://$1.otherdomain.com/file.php?f=$2 [R]
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
Thanks