Not importing image from youtube

I am trying to import news from youtube using feeds module, but it does not import images. I also installed feeds image grabber module with the following code modification. It works for other websites, but not youtube.

Fixed with latest dev versions of feeds and image grabber by adding the following to feeds_imagegrabber/libraries/url_to_absolute.inc :

After line 424, at the begining of function encode_url

if(is_array($url)) {
$url = array_pop($url);
}