In order to video chat with other attendees, you must first add them as a contact. Do this by clicking the "+" icon inside their profile after clicking on their name. 1. By clicking on the person you can directly start a 1:1 video chat by clicking on the camera icon. 2. From a text chat, you can invite the participants (whether 1:1 or group chat) to a video call at any time by clicking on the camera symbol in the lower area.