oEmbed support

[renecnielsen]

I would love to see oEmbed support, which could make embedding a plethora of content much easier, including all the current embeds providers (except, maybe, Github Gists?). We could also embed things like Instagram, Facebook, TikTok, WordPress, Miro, Scribd, Slideshare and a few hundred more providers. And those of us who work with data would get support for the likes of Observable, Flourish, and Datawrapper.

Specifically, I'm currently putting some Flourish charts into iFrames, which works decently enough, but oEmbed would make it both easier and give me a better result (no fixed height of the element, in particular).