A shockingly simple work-around allows your followers to share private photos and videos posted to both Facebook and Instagram.
The hack — which works on Instagram stories as well — requires only a rudimentary understanding of HTML and a browser. It can be done in a handful of clicks. A user simply inspects the images and videos that are being loaded on the page and then pulls out the source URL. This public URL can then be shared with people who are not logged in to Instagram or do not follow that private user.