How do you set the video player size responsive on mobile?

[mjmaramba]

Hi, I would like to ask on how to set the video player size to width: 100% because I want it to be responsive on mobile?

var pluginName = 'ytplaylist';
var defaults = {
holderId: 'ytvideo',
playerHeight: 430,
playerWidth: 790,
addThumbs: false,
thumbSize: 'small',
showInline: false,
autoPlay: true,
showRelated: true,
allowFullScreen: false,
deepLinks: false,
onChange: function(){},
start: 1,
secure: 'auto' //false|true|'auto'
};