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// function to rewrite the VIMEO YOUTUBE URL
function mod_url($url){
	$yt = strpos($url, 'youtube');
	$vim = strpos($url, 'vimeo');
	if($yt): 
		$url = str_replace("watch?v=","v/",$url);
	endif;

	if($vim):
		$url = str_replace("vimeo.com","player.vimeo.com/video",$url);
	endif;

	return $url;
}