Riff lets you film videos and uploaded them to th e app. Friends and strangers can then film relevant clips and attach them to the end of your video Despite being launched on April Fool's day, and using an #AprilFools hashtag to promote its features, Facebook's latest app is reportedly not a hoax. Called Riff, it lets you film videos and upload them to Facebook and the app. Friends and strangers can then film relevant clips and attach them to the end of your video to create a collaborative project. The app was created by London-based developers through Facebook's Creative Labs.Riff was developed in London and is available on Android and iOSIt lets you film a video and uploaded it to the app and FacebookFriends then film their own clips and tag them onto the end of your video
'Today, we are introducing _, a creative tool to make videos with friends.'