According to TechCrunch, Facebook has started enabling the ability to view and upload Live Photos in its iOS app. Though not available to all users globally, some can already experience Live Photos support as of today, while others will have to wait until early next year.
Uploading a Live Photo is pretty similar to uploading your standard still — in fact, it’s identical, save for one extra step. While uploading a photo from your camera roll that happens to be Live Photo-enabled, a “LIVE” box appears in the bottom right; tap that, and it’ll upload as a Live Photo. Don’t tap it, and only the still goes up.
Naturally, Facebook shows still photos on the feed but if the Live Photos icon appears at the bottom right, you can tap and hold the photo to start playing.