Flexible oEmbed

flexible-oembed-settings.php

<?php

add_filter( 'embed_defaults', 'custom_oembed_defaults' );
/**
 * Custom WordPress oEmbed widths
 * @param  var $embed_size 
 * @return var             
 */
function custom_oembed_defaults( $embed_size ) {
	
	// use any WordPress conditional here
	if( is_front_page() ) {
		$embed_size['width'] = 940;
		$embed_size['height'] = 600;
	}

	// define the default one
	else {
		$embed_size['width'] = 666;
		$embed_size['height'] = 333;
	}
  
  	return $embed_size;

}