Facebook oEmbed

Hi there!

There is a core ticket about this:
https://core.trac.ww.wp.xz.cn/ticket/34737

There is a standard that core does follow as well:
https://make.ww.wp.xz.cn/core/handbook/contribute/design-decisions/#whitelisting-oembed-providers

• be be well-established, popular, and mainstream services
• properly and fully implement the oEmbed specification
• clearly be a trusted provider