Instagram has launched its video chat feature and revealed new celebrity camera filters as part of a major overhaul. At the F8 Developer Conference last month, Mark Zuckerberg revealed the Facebook-owned app will be teaming up with other platforms such as Spotify to allow users to post directly to their Instagram Stories. Today's app update sees the new video chat feature that will allow users to speak face-to-face with their friends individually, or in small groups. The firm is also rolling out new interactive camera effects, and has overhauled its Explore tab to organize content into'topic channels.' One of the first new filters is an Ariana Grande effect that creates multiple images of your face all over the screen.