1. Display Section : By default YouTube section is visible, By ticking it off you can hide the section. (Available for PRO Version only)
2. You don’t need to put the whole YouTube URL just YouTube video ID. For example – If this is the video (https://www.youtube.com/watch?v=RXBS4K4oSsE) you want to display on the frontpage. You should paste RXBS4K4oSsE in the YouTube video ID text field on customizer.

Customize as you please and finally click “Save & Publish” button at the top.