Facebook does provide embed code for publicly share content. Including videos, images and posts.
For example, the post @keith1 shared has this embed code for the video.
<iframe src="https://www.facebook.com/plugins/video.php?href=https%3A%2F%2Fwww.facebook.com%2Fdima.koslowski%2Fvideos%2Fvb.557079631068239%2F879922095450656%2F%3Ftype%3D3&show_text=0&width=560" width="560" height="315" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true" allowFullScreen="true"></iframe>
and this code for the post itself.
<iframe src="https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2Fdima.koslowski%2Fvideos%2F879922095450656%2F&width=500" width="500" height="616" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true"></iframe>