Plone Outputfilters and TransformChain (how to display things differently) - Michael McFadden

This talk should make you more confident in modifying and
extending Plone's powerful and efficient post-publish transformation
tools. The first part covers plone.outputfilters - changing the
behavior of TinyMCE images and the concepts of mime type transforms.
The second part is on plone.transformchain - intercepting the entire
HTML reply and changing the content before it is sent to the client.

https://2021.ploneconf.org/schedule/plone-outputfilters-and-portal-transforms