The December 2021 release announcement for videosdk.live details a series of enhancements and updates across various platforms and tools. Key updates include new user dashboard features, such as the ability to end meetings or remove participants, and the introduction of a whiteboard in BETA for RTC Javascript prebuilt v0.1.26. Chat history accessibility across different SDKs, including Javascript, React, React Native, and Android, is emphasized, with additional features like screenshare support on iOS and improved compatibility for Android devices below version 10. The release also highlights updated REST APIs with new functionalities for meeting management and improved latency through region selection. Furthermore, documentation and support have been bolstered with resources for integrating with Wordpress and developing applications using Flutter, alongside tutorials for creating video chat apps using the Video SDK.