Use the contact list and Dial button to make Skype call. If incoming stream has video, the status LED named as Vid In glows green. The video stream will be available to Onyx Studio for compositing. The call status is shown in the status area of the UI. You may check proper operation of Skype connection, by making a call to "Echo 123" and test if both audio input and output are working. If there is an issue with either incoming or outgoing audio, you may try changing the audio input or output device using audio options as described in Audio Configuration. If the audio and video are working with regular Skype application, you should not see issues with Onyx also.