Hello,
You can simply place the YouTube video link on you static front page content (If you have selected your home page as a static front page) by going to
Dashboard -> Page -> All Page -> (select and edit the page you have used as static front page ) -> Copy and paste the YouTube Video link on the content area.
Just make sure that you have enabled to show hope page content from,
Dashboard -> Appearance -> Customize -> Theme Options -> Home Page Options -> Show home content
Hope it helps.
Best regards.
.
