If you would like to ad ads as a source of revenue, the settings can be set in the advertisement section of the Magine Pro Console. After you have set up campaigns with your ad-suppliers, you can can enter the VAST-tags and decide what kind of rolls you want (Preroll, Midroll or Postroll). Both default settings and asset specific settings can be done. 

To start using ads a commercial deal must be agreed with Magine Pro.

Both Default settings and Overrides can be set. They include the same kind of settings. But overrides are only for specific media file.