hosts设置了 127.0.0.1 www.firstphp.com
apache中
<VirtualHost *:80>
ServerName www.firstphp.com
ServerAlias www.firstphp.com
DocumentRoot "G:\WWW\video"
<Directory "G:\WWW\video">
Options +Indexes +Includes +FollowSymLinks +MultiViews
AllowOverride All
Require local
</Directory>
</VirtualHost>
看下APPACHE的错误日志
apache重启了吗?