It is in fact just 2-3 lines in the view.html.php of the invoice.
if (VmConfig::get ('enable_content_plugin', 0)) {
if(!class_exists('shopFunctionsF'))require(JPATH_VM_SITE.DS.'helpers'.DS.'shopfunctionsf.php');
shopFunctionsF::triggerContentPlugin($vendor, 'vendor','vendor_store_desc');
shopFunctionsF::triggerContentPlugin($vendor, 'vendor','vendor_terms_of_service');
shopFunctionsF::triggerContentPlugin($vendor, 'vendor','vendor_legal_info');
}
But why do you use the content video plugin in the vendor description,tos and so on?