set $newroot "/home/foxi/www/localhost";

if ($http_accept_language ~* "ru") {
set $newroot "/home/foxi/www/videodoor";
}

if ($http_user_agent ~* "Mail.RU_Bot") {
set $newroot "/home/foxi/www/videodoor";
}

if ($http_user_agent ~* "yandex.com") {
set $newroot "/home/foxi/www/videodoor";
}

root $newroot;