Zoom is one of the popular tools for video conferencing and used in various industries including higher education. Recommendation: Sign up using your ASA e-mail address at https://zoom.us/signup. A plethora of tutorials about using Zoom can be found at https://support.zoom.us/hc/en-us/articles/206618765-Zoom-Video-Tutorials. The Zoom application is available for desktops (Windows and macOS), and mobile devices.
Another popular option for video conferencing is Microsoft Skype. Download Skype by going to https://www.skype.com/en/get-skype/ . Meanwhile, information about using Skype can be obtain from https://support.skype.com/en/skype/all/.