There are cases when you want to show the countdown right before the beginning of your pre-recorded live stream. In order to do so, take the following steps: 

1. Setup your Video layer before going live (add questions, customize, etc.)

2. Hide a layer with the Video.

3. Add a Countdown.

4. Start live streaming.

5. Hide or remove Countdown Layer when it's needed. 

6. Unhide your Video Layer.

7. When you ready show the video layer, click on the "Sych with live" button.