此插件可能满足您的要求。

http://wordpress.org/extend/plugins/recently-viewed-posts

用法

get_recently_viewed_posts( $max_shown = 10 ) 返回li的字符串。recently_viewed_posts( $max_shown = 10 ) 打印div

如果您有兴趣学习如何自己开发此功能，请下载插件并查看源文件。WordPress是开源的！

更新：

上述插件无法工作。以下方法将有助于设置最近查看的视频ID。

<?php        
/*
 * Plugin Name: WPSE_63266_Recently_Viewed
 */
function wpse_63266_update_recently_viewed(){

    /**
     *  If is admin or isn\'t single, then return.
     *  To get only singular video posts use; if(!is_singular(\'videos\')) return;
     */
    if(is_admin() || !is_single()) return;

    global $post;

    // Get the current post id.
    $current_post_id = get_the_ID();

    if(is_user_logged_in()){

        // Store recently viewed post ids in user meta.
        $recenty_viewed = get_user_meta(get_current_user_id(), \'recently_viewed\', true);
        if( \'\' == $recenty_viewed ){
            $recenty_viewed = array();            
        }

        // Prepend id to the beginning of recently viewed id array.(http://php.net/manual/en/function.array-unshift.php)
        array_unshift($recenty_viewed, $current_post_id);        

        // Keep the recently viewed items at 5. (http://www.php.net/manual/en/function.array-slice.php)
        $recenty_viewed = array_slice($recenty_viewed, 0, 5); // Extract a slice of the array

        // Update the user meta with new value.
        update_user_meta(get_current_user_id(), \'recently_viewed\', $recenty_viewed);

    } else {

    /**
     * For non-logged in users you can use the same procedure as above
     * using get_option() and update_option()
     */

    }
}
add_action(\'wp_footer\', \'wpse_63266_update_recently_viewed\');

function wpse_63266_show_recently_viewed(){

    $recenty_viewed = get_user_meta(get_current_user_id(), \'recently_viewed\', true);
    echo \'<pre>\'; print_r($recenty_viewed); echo \'</pre>\';
}
add_action(\'wpse_63266_recently_viewed\', \'wpse_63266_show_recently_viewed\');
?>

do action() 在模板中查看在浏览帖子时数组值（视频ID）的更改。

do_action(\'wpse_63266_recently_viewed\');