Facebook Instant Articles Embed

Problem/Motivation

According to facebook developers instructions, embed content in Instant Articles must be encapsulated in <figure class="op-interactive"> tag.
https://developers.facebook.com/docs/instant-articles/reference/embeds/

Embeds are specified using the standard HTML element, which wraps an

element containing the markup for your embedded media. To include any social embed or interactive element in your Instant Article, apply the op-interactive class to a element. The element representing the embed must be included standalone within the body of the article and not enclosed within a

element.

Steps to reproduce

Embed any content (youtube, facebook, twitter, etc) and publish the article to Facebook Instant Article

Proposed resolution

In the process method of UrlEmbedFilter add: $url_output = '<figure class="op-interactive">' . $url_output . '</figure>'; Before replaceNodeContent

Remaining tasks

User interface changes

API changes

Data model changes