$data_array = array();
$get_row = $dom->getElementsByTagName('li');
    foreach($get_row as $value){

        if((strstr($value->getAttribute('class'), 'yt-lockup-video'))) {
            $image_info = $value->getElementsByTagName('img');
            foreach($image_info as $image){
                if((strstr($image->getAttribute('data-thumb'), 'mq'))) {
                    $data_array[] = array('IMAGE_URL' => $image->getAttribute('data-thumb'));
                }
                if((strstr($image->getAttribute('src'), 'mq'))) {
                    $data_array[] = array('IMAGE_URL' => $image->getAttribute('src'));
                }
            }
            $url_info = $value->getElementsByTagName('a');
            foreach($url_info as $url) {
                if($url->hasAttribute('class') && strstr($url->getAttribute('class'), 'yt-uix-sessionlink') && strstr($url->getAttribute('href'), 'watch')) {
                    if(strlen($url->childNodes->item(0)->nodeValue) >= '10') {

                        $data_array[] = array(
                                'HREF' => $url->getAttribute('href'),
                                'TITLE' => trim($url->childNodes->item(0)->nodeValue),
                                             );
                    }
                }

            }

        }
    }

CURRENT OUTPUT OF $data_array =====================================================================

Array
(
    [0] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/YOeyOjVe1To/mqdefault.jpg
        )

    [1] => Array
        (
            [HREF] => /watch?v=YOeyOjVe1To
            [TITLE] => Salt & Eric Ross FLame Off at the Great Lakes Art Show
        )

    [2] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/Q7b_AMduMUs/mqdefault.jpg
        )

    [3] => Array
        (
            [HREF] => /watch?v=Q7b_AMduMUs
            [TITLE] => Glass blowing - Banana Factory
        )

    [4] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/ttTfbtWyKcM/mqdefault.jpg
        )

    [5] => Array
        (
            [HREF] => /watch?v=ttTfbtWyKcM
            [TITLE] => Glass Blowing Studio in Barcelona
        )

    [6] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/Xa32JkREmeQ/mqdefault.jpg
        )

DESIRED OUTPUT OF $data_array =====================================================================
Array
(
    [0] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/YOeyOjVe1To/mqdefault.jpg
            [HREF] => /watch?v=YOeyOjVe1To
            [TITLE] => Salt & Eric Ross FLame Off at the Great Lakes Art Show
        )

    [1] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/Q7b_AMduMUs/mqdefault.jpg
            [HREF] => /watch?v=Q7b_AMduMUs
            [TITLE] => Glass blowing - Banana Factory
        )

    [2] => Array
        (
            [IMAGE_URL] => //i1.ytimg.com/vi/ttTfbtWyKcM/mqdefault.jpg
            [HREF] => /watch?v=ttTfbtWyKcM
            [TITLE] => Glass Blowing Studio in Barcelona
        )

)