Hi
I came across this feature and I know its a website script. But I was wondering if some cleaver person out there knows of or has created a plugin or stand alone app, that enables possibly a gif or other format that is acceptable for upload to social media such as Google or Facebook. or possibly know a site where you can load up photos and create the effect as shown in the link.
If you look at this Guadian link you understand the effect. I very much into now and then photography and this function is exactly how I would like to show my work.
https://www.theguardian.com/artanddesign/ng-interactive/2014/jun/01/d-day-landings-scenes-in-1944-and-now-interactive.