The best way to add youtube live to your website is to copy and paste this code:
<center><iframe width="560" height="315" src="https://www.youtube.com/embed/live_stream?channel=REPLACE&autoplay=1" frameborder="0" allowfullscreen></iframe></center>
But replace "REPLACE" with your youtube channel ID.
Go to the module panel (click the "+" on the top right corner). And drag and drop HTML item where you'd like it. Then paste in your embed code.
Make the video bigger: change the "width=560" to a different pixel #. The example is using 860 pixels for the width. You can do the same for the height.