At the moment, the feature is only available in one-to-one mode. It will be expanded in the future to include voice calls and group video calls
Desktop calls are designed to work in both portrait and landscape directions. The call screen will appear in a separate, resizable window, which will always be at the top of your computer screen, so you don’t have to search for it in browser tabs or other open windows. Whatsapp has confirmed that in the future the functionality will be expanded to include voice calls and group video calls.
How to enable calls and video calls on WhatsApp Desktop – First of all, to make free audio and video calls with your WhatsApp Desktop contacts, the application must be installed on your computer. Calls with WhatsApp Desktop are available at: Windows 10 64-bit version 1903 and later and macOS 10.13 and later.
To make and receive calls and video calls on WhatsApp Desktop, you must have a microphone; Webcam; an active internet connection on your computer and phone; Granting WhatsApp permission to access your computer’s microphone and camera.
