Change player to autoplayer for autostart on page load.
Width sizes to iframe. Put 100% for screen width.
This height will look good full width in mobile view
This version has increased height for desktop view
An working example is in the footer of this page
Change to autofooterplayer for autostart on page load
For the embed code of the players below, just click the white button
on the top right of the player. Remove OFF in the code for autoplay.