-The ACS WebJS SDK, starting in version [1.15.1](https://github.com/Azure/Communication/blob/master/releasenotes/acs-javascript-calling-library-release-notes.md#1153-stable-2023-08-18), provides a feature called OptimalVideoCount (OVC). This feature can be used to inform applications at run-time how many videos from different participants can be optimally rendered at a given moment in a group call (2+ participants). This feature exposes a property `optimalVideoCount` that is dynamically changing during the call based on the network and hardware capabilities of a local endpoint. The value of `optimalVideoCount` details how many videos from different participants application should render at a given moment. Application should handle these changes and update number of rendered videoes accordingly to the recommendation. There's a cooldown period (around 10s), between updates that to avoid too frequent of changes.
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