Working in a 5.1.4 Installation, maybe in 5.2:
<?xml version="1.0"?>
<registry
xmlns:i18n="http://xml.zope.org/namespaces/i18n"
i18n_domain="my.addon">
<record
name="plone.other_settings"
interface="Products.CMFPlone.interfaces.controlpanel.ITinyMCESchema"
field="other_settings">
<value>{
"style_formats" : [
{
"title" : "Bild mit Titel",
"inline" : "img",
"attributes" : {
"class": "captioned"
}
},
{
"title" : "Videobox",
"block" : "p",
"attributes" : {
"class": "wcvideo-container"
}
}
],
"style_formats_merge": "True"
}</value>
</record>
</registry>
This is only for the "Embedded New Styles in TinyMCE" not for a Working WCMedia Example.