The Twilio Programmable Video team has announced the general availability of the Track Subscription API, which allows developers to define which participants receive which tracks and control dynamically what end-users see and hear in Group Rooms. This new API provides more flexibility than the previous subscribe-to-all model, enabling scenarios such as subscribe-to-one, subscribe-to-some, role-dependent-subscriptions, media-type-dependent-subscriptions, and others. Developers can set and dynamically change these rules at any time as long as the corresponding participant is connected, giving them full control over how participants communicate in a Group Room. The Track Subscription API is available in Group Rooms, Twilio's solution for multiparty video conferencing, and can be used to improve participant experiences in various use cases, including webinars, presentations, contact centers, and more.