ReplayKitSave.cs

private void OnEnable()
{
    ReplayKitManager.DidRecordingStateChange 	+= DidRecordingStateChange;
}

private void OnDisable()
{
    ReplayKitManager.DidRecordingStateChange 	+= DidRecordingStateChange;
}

  public void StopRecording()
    {
        if (ReplayKitManager.IsRecording())
        {
            ReplayKitManager.StopRecording();
        }
    }

    private  void  DidRecordingStateChange(ReplayKitRecordingState  state,  string  message)  
{  
    Debug.Log("Received Event Callback : DidRecordingStateChange [State:"  +  state.ToString()  +  " "  +  "Message:"  +  message);  

    switch(state)  
    {  
        case  ReplayKitRecordingState.Started:  
            Debug.Log("ReplayKitManager.DidRecordingStateChange : Video Recording Started");  
            break;  
        case  ReplayKitRecordingState.Stopped:  
            Debug.Log("ReplayKitManager.DidRecordingStateChange : Video Recording Stopped");  
            break;  
        case  ReplayKitRecordingState.Failed:  
            Debug.Log("ReplayKitManager.DidRecordingStateChange : Video Recording Failed with message ["  +  message+"]");  
            break;  
        case  ReplayKitRecordingState.Available:  
            Debug.Log("ReplayKitManager.DidRecordingStateChange : Video Recording available for preview");  
            ReplayKitManager.SavePreview((error) =>
                {
                    SetStatus("Saved preview to gallery with error : " + ((error == null) ? "null" : error));
                    textMessage.SetActive(true);
                });
            break;  
        default:  
            Debug.Log("Unknown State");  
            break;  
    }  
}