MIME Types represent file types that are presented to your web browser. The MIME types option in the control panel allows you to specify how the browser views the file. Adding new MIME types with Helm 3 is easily done.
First, log into your HELM control panel.
Click on the Domains icon.
Click the domain for which you would like to alter the MIME types for.
Click the MIME Types icon.
As you can see there are currently no MIME types in place for this domain. Click Add New.
Enter the extension of the MIME type and the Content Type, then click Save. Helm will update your website settings to allow this type of MIME type to be parsed, providing your browser allows this. It doesn’t matter what MIME types you set up to be opened by your web browser – it can only open files of types that it supports. You may need browser plug-ins or other programs installed. All Helm does is alter the website settings to allow the MIME types to be supported where applicable.
As an example, for flash files, use the following:
Content Type: video/x-flv
You should now see the newly created MIME type. You can repeat this process as many times as needed to add a variety of MIME types.