The latest iPhones come with the ability to turn still images into video - but sharing options had been limited to other Apple apps.
But now that's changing as Facebook, one of the leading forums for photo sharing, adds Apple's Live Photos feature to Facebook's iPhone and iPad app.
Facebook will start offering it from Monday, to a limited number of users initially, with a broader rollout planned in the coming weeks.
Facebook's support follows a similar move by Yahoo's Tumblr service.
For instance, you can snap a shot of your kid blowing out birthday candles - and get video showing the flame going out as everyone sings Happy Birthday.
The phone automatically records video in the background when the camera app is open.
The recording is immediately discarded if you do nothing.
When you snap a shot, the phone saves a second and a half of video leading to that shot and continues recording until you get three seconds in all.
Why not just take video?
You might not know ahead of time when you'll encounter a scene lending itself to video. With Live Photos, you always get the video option - unless you turn the feature off.
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