Windows Server 2008 + IIS7: .ogg files can not be played

Add the OGG MIME type in your web.config. Something like:

<configuration>
    <system.webServer>
        <staticContent>
            <mimeMap fileExtension=".m4v" mimeType="video/m4v" />
            <mimeMap fileExtension=".ogg" mimeType="audio/ogg" />
            <mimeMap fileExtension=".oga" mimeType="audio/ogg" />
            <mimeMap fileExtension=".ogv" mimeType="video/ogg" />
            <mimeMap fileExtension=".webm" mimeType="video/webm"/>
        </staticContent>
    </system.webServer>
</configuration>

See:

• Adding custom MIME types to IIS (for ogv/mp4 etc)
• How to add MIME types