How to enable IIS to play MP4 files

I am using server 2012 for this guide, but server 2008 is very similiar.

Select the site to configure in IIS.

1)Go to Administrative Tools, Server Manager, Click Roles, Click Web Server IIS (+) SIGN, Internet Information Manager
2)Double click "MIME TYPES" section and select "New Type"
3)Click ADD in the top right
3)For .mp4 files type ".mp4" as the extension and "video/mp4" as the MIME type, without the quotes.
4)Select "OK"
5)Go back to WEB SERVER IIS 5)Find the "World Wide Web Publishing Service" and click on the restart icon on top or open up and choose restart