On Thursday Facebook announced an update to its news feed that will auto-play embedded videos as you scroll through. the videos will be muted by default. Tap them for sound and to watch in full screen.This is similar to how videos show up on Facebook-owned Instagram. As you scroll through, they start playing automatically - although they are not muted by default on the video- and photo-sharing site.
Twitter's Vine does the same thing, with the six-second looping videos playing as they come into view.
Facebook's Instagram added video in June, and the company made its first acquisition last month: video-sharing app Luma.