Facebook is bringing in another way to respond to comments: video. The idea was prototyped early this year at Facebook’s 50th Hackathon but has been refined by the Facebook team afterwards to become an official feature. Being able to make video responses is available to all users around the world. You can post them as replies to posts by people and pages and also within groups and events. It works on desktop web, iOS, and Android. Just tap on the camera icon next to the comment field and share your video comment.
Source: Facebook