BOOTSTRAP 3.0 - Open YouTube Video Dynamicaly in Modal Window. Allow setting width and height.

boostrap-youtube-modal.js

// REQUIRED: Include "jQuery Query Parser" plugin here or before this point: 
// 	     https://github.com/mattsnider/jquery-plugin-query-parser

$(document).ready(function(){
	
// BOOTSTRAP 3.0 - Open YouTube Video Dynamicaly in Modal Window
// Modal Window for dynamically opening videos
$('a[href^="http://www.youtube.com"]').on('click', function(e){
  // Store the query string variables and values
	// Uses "jQuery Query Parser" plugin, to allow for various URL formats (could have extra parameters)
	var queryString = $(this).attr('href').slice( $(this).attr('href').indexOf('?') + 1);
	var queryVars = $.parseQuery( queryString );

	// if GET variable "v" exists. This is the Youtube Video ID
	if ( 'v' in queryVars )
	{
		// Prevent opening of external page
		e.preventDefault();

		// Variables for iFrame code. Width and height from data attributes, else use default.
		var vidWidth = 560; // default
		var vidHeight = 315; // default
		if ( $(this).attr('data-width') ) { vidWidth = parseInt($(this).attr('data-width')); }
		if ( $(this).attr('data-height') ) { vidHeight =  parseInt($(this).attr('data-height')); }
		var iFrameCode = '<iframe width="' + vidWidth + '" height="'+ vidHeight +'" scrolling="no" allowtransparency="true" allowfullscreen="true" src="http://www.youtube.com/embed/'+  queryVars['v'] +'?rel=0&wmode=transparent&showinfo=0" frameborder="0"></iframe>';

		// Replace Modal HTML with iFrame Embed
		$('#mediaModal .modal-body').html(iFrameCode);
		// Set new width of modal window, based on dynamic video content
		$('#mediaModal').on('show.bs.modal', function () {
			// Add video width to left and right padding, to get new width of modal window
			var modalBody = $(this).find('.modal-body');
			var modalDialog = $(this).find('.modal-dialog');
			var newModalWidth = vidWidth + parseInt(modalBody.css("padding-left")) + parseInt(modalBody.css("padding-right"));
			newModalWidth += parseInt(modalDialog.css("padding-left")) + parseInt(modalDialog.css("padding-right"));
			newModalWidth += 'px';
			// Set width of modal (Bootstrap 3.0)
		    $(this).find('.modal-dialog').css('width', newModalWidth);
		});

		// Open Modal
		$('#mediaModal').modal();
	}
});

// Clear modal contents on close. 
// There was mention of videos that kept playing in the background.
$('#mediaModal').on('hidden.bs.modal', function () {
	$('#mediaModal .modal-body').html('');
});

}); 

Hi, I'm pretty bad with js, I'm having trouble with mobile devices; the modals are still default size, cutting off most of the video.

I tried a simple solution by adding a "_blank" attr using if ($(window).width() <= 767) to the link triggering the modal but it doesn't work. Am I doing something wrong?