The article below represents a few instructions on how to configure the setup in XML form according to your needs. On the code pictures, the right column of the XML file represents implemented settings.
Set camera to Used
<Used>True</Used>
Change camera's Store options
<VideoStoreMode> is missing if Always fast is used
<VideoStoreMode>1</VideoStoreMode> ... Fast on trigger
<VideoStoreMode>2</VideoStoreMode> ... Fast on trigger, slow otherwise
Enabling camera trigger
<Trigger>True</Trigger> if Use trigger is used