How to Embed External Content using oEmbed
You can embed content from various sites like YouTube videos, Vimeo videos, Tweets and even Reddit comments by pasting their permalink URLs in Page Builder Sandwich.
Take note that one entire line of text should contain only the URL
Page Builder Sandwich works alongside WordPress’ oEmbed feature. So URLs that you can embed in the backend should be supported. Plugins that add support to additional oEmbed providers should work as well.
You can find a list of oEmbed providers from the codex: https://codex.wordpress.org/Embeds