Microsoft Teams: Live Share SDK support for meeting extensions
Live Share is a new developer capability designed to transform Teams meeting apps into collaborative multi-user experiences without writing any dedicated back-end code. Live Share SDK support for meeting extensions enables general-purpose collaboration features, turn-key media synchronization to co-watch videos in meetings, and inking, cursors & annotations.
More info: https://learn.microsoft.com/en-us/microsoftteams/platform/apps-in-teams-meetings/teams-live-share-overview?tabs=javascript