How to call a specific value within the functions.php file?

function youtube($atts) {

    global $post;
    $value = get_post_meta($post->ID, 'video_link', true);

    extract(shortcode_atts(array(    //Make sure not to include the 'value' as part of this array. 
        "width" => '475',
        "height" => '350',
        "name"=> 'movie',
        "allowFullScreen" => 'true',
        "allowScriptAccess"=>'always',
    ), $atts));
    return '<object style="height: '.$height.'px; width: '.$width.'px"><param name="'.$name.'" value="'.$value.'"><param name="allowFullScreen" value="'.$allowFullScreen.'"></param><param name="allowScriptAccess" value="'.$allowScriptAccess.'"></param><embed src="'.$value.'" type="application/x-shockwave-flash" allowfullscreen="'.$allowFullScreen.'" allowScriptAccess="'.$allowScriptAccess.'" width="'.$width.'" height="'.$height.'"></embed></object>';

}

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