Charlie - if you saw it on the NJF Group Facebook page you can't share it from there since it's a private group...
What you can do is copy this link
https://youtu.be/DBCZs3uSkKY, log onto Facebook and paste the link into your post.
That or if you're on your computer, look over to the left and you'll see a blue F. Click on it that will give you a form to share it on Facebook.