This page should list all tools to embed content from a link. When a recognized URL is added, maybe Tiki could offer to convert to a plugin for nicer viewing?
See also: https://indieweb.org/link-preview
Presumably, we should be using the oEmbed standard. Are there others?
Todo: evaluate all the options like was done for Slideshow framework stats comparison and integrate one to Tiki. Ideally, the same as for our XMPP solutions (Pàdé and Converse)