I saw this effect for the first time in Lumia 950. I am sure it is not only in the higher version but also more recent Windows smart phones. You might have also found it in the pictures you recently captured and saved to your Camera Roll. Perhaps you might not have associated these (.nar files) with the cute effect you observed. You (in the Photo tile) click on one of these images and it opens up and comes to life briefly (Live Images) before settling to a still that you have been used to all along (almost like a very short video). These are live pictures.
If you look at the properties of these picture you will see the .nar extension. NAR extension refers to Nikon Capture Advanced Raw file.
If you try to attach it with a message you will get two options, an image or a video. I sent it out to my wife to her iPhone 6S and she got a video. The video effect on iPhone 6S is Ok but not like it is on Windows 10 Phone Lumia 950. You have got to see it to know how it looks. This is developing area of rich capture. You probably will not see the effect on the browser in your computer although I have uploaded a .var file here. It has to be the phone which has the right software. You may trying saving this file without changing the extension and opening the saved file with a PHOTO app on your Windows 10 Computer.
If you look at the properties of these picture you will see the .nar extension. NAR extension refers to Nikon Capture Advanced Raw file.
If you try to attach it with a message you will get two options, an image or a video. I sent it out to my wife to her iPhone 6S and she got a video. The video effect on iPhone 6S is Ok but not like it is on Windows 10 Phone Lumia 950. You have got to see it to know how it looks. This is developing area of rich capture. You probably will not see the effect on the browser in your computer although I have uploaded a .var file here. It has to be the phone which has the right software. You may trying saving this file without changing the extension and opening the saved file with a PHOTO app on your Windows 10 Computer.