Yes, Video Calling features in now available in stand alone Facebook Messenger stand alone Application.
Facebook has launched the Video Calling Feature for the iOS and Android Users. Initially the update will roll out in Belgium, Canada, Croatia, Denmark, France, Greece, Ireland, Laos, Lithuania, Mexico, Nigeria, Norway, Oman, Poland, Portugal, UK, US and Uruguay. Other regions will get the Video Calling feature in coming months.
Users can simply tap on the Video Icon at the top right corner of the screen to start a video call within the existing messaging conversation. With this said, the Facebook messenger is all set to compete with the lights of Skype, Apple FaceTime and Google Hangouts.