https://wccftech.com/twitter-lets-you-share-ios-live-photos-directly-as-gifs/

Live Photos have been around on iOS since as early as 2015. The feature has since made its way to other platforms and is now a staple among most flagships. A Live Photo is a hybrid between a video clip and a photo. It consists of 1.5 seconds of video before and after you tap the shutter button.

For all the benefits that they offer, Live Photos still exist in a weird limbo. While its name indicates that it is a photo, it is identical to a GIF for all practical purposes. The problem gets even more complicated while trying to share it. Social media platforms are often unable to differentiate between a regular photo and a Live Photo. Very often, the only way to go about is to convert a Live Photo into something more traditional, such as a video or GIF. As of today, you can directly share Live Photos on Twitter on iOS.