public function modify_export_output( $fields, $event_id, $key_name, $type = null ) {
		$event = tribe_get_event( $event_id );

		if ( ! $event instanceof \WP_Post ) {
			return $fields;
		}

		// If it is not a virtual event, return fields.
		if ( ! $event->virtual ) {
			return $fields;
		}

		// If there is a venue, return fields as is.
		if ( isset( $event->venues[0] ) ) {
			return $fields;
		}

		/**
		 * Allow filtering of the export fields by the active video source.
		 *
		 * @since 1.7.3
		 *
		 * @param array    $fields   The various file format components for this specific event.
		 * @param \WP_Post $event    The WP_Post of this event.
		 * @param string   $key_name The name of the array key to modify.
		 * @param string   $type     The name of the export type.
		 */
		$fields = apply_filters( 'tec_events_virtual_export_fields', $fields, $event, $key_name, $type );

		return $fields;
	}