Code within the X app suggests that the platform will be adding both audio and video call functionality in the future, but this will be restricted to premium subscribers only as a paid feature.
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Facebook has added the option to make audio and video calls to Messenger's end-to-end encrypted secret conversation. The firm is now looking to allow secret conversations for group chats.
The W3C and the IETF have finally made WebRTC an official standard. WebRTC has been supported by popular web browsers since 2012 and enables peer-to-peer video and audio calls on the web.