This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
onMSVideoOptimalLayoutChanged is an event which occurs when the msIsLayoutOptimalForPlayback state changes.
This proprietary property is specific to Internet Explorer and Microsoft Edge.
|Event Property||object.onMSVideoOptimalLayoutChanged = handler;|
|attachEvent Method||object.attachEvent("onMSVideoOptimalLayoutChanged", handler)|
|addEventListener Method||object.addEventListener("", handler, useCapture)|