This widget comes free with WPmozo Addons Lite. To use it, simply install and activate the free version of plugin.

https://wordpress.org/plugins/wpmozo-addons-lite-for-elementor

How to add widget on page

The Facebook Embedded Video widget allows you to easily display public Facebook videos directly on your website, helping you engage visitors with social content without redirecting them away from your site.

To add the Facebook Embedded Video widget, follow these steps.

1. Create/edit a page/post that uses Elementor builder.
2. Create/edit container.
3. Search widget WPMozo Facebook Embedded Video under WPMozo.