Facebook SDK script for embedding videos

Hi there,

I have been trying to embded facebook videos and failing.

I have been trying to follow the guides as per facebook https://developers.facebook.com/docs/plugins/embedded-video-player#wordpress

However I cannot get the videos to embed.

Where should I be adding the Javascript coding exactly so that I can use the simple embed option anywhere on my site: https://www.purple-dog.co.uk

Thanks in advance