magento-test/app/code/Magento/MediaContentCms/etc/media_content.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_MediaContentApi:etc/media_content.xsd">
    <search>
        <patterns>
            <pattern name="media_gallery">/{{media url="?(.*?)"?}}/</pattern>
            <pattern name="wysiwyg">/src=".*\/media\/(.*?)"/</pattern>
        </patterns>
    </search>
</config>