Zoom is an online video conferencing platform that can be used on your phone, computer, or tablet. It can be downloaded for free. With the free version you can have up to 40 minute sessions.
Articles and Video webinars produced by Zoom: (more found at support.zoom.us)
Article: Getting Started on Mac or Windows
Article: Quick Start Guide for New Users
Video: Meeting Controls
Video: Joining a Meeting by Phone
Video: Sharing your Screen