To embed a Facebook video into your Joomla site go to administrator section and add into an article, a module or script the text [ fbvideo = https://www.facebook.com/watch/?v=252700434355934 ] (without the spaces and replacing the URL with the one you want to embed). The next video used as example was uploaded on Facebook by Business Insider and contains 5 brain teasers with matches that will have you scratching your head. Try to solve them before you watch further.
For embedding Facebook photos add into the page the text [ fbphoto = https://www.facebook.com/164146393742080/photos/a.164152193741500.1073741828.164146393742080/439541466202570/?type=1 ]. This time is a Japanese environment and some tea cup.
In the administrator section you can edit this string - you can change its name and the CSS code attached. Using the CSS code you can set the width and height of the embedded video, the position and other attributes (like the margins).