Example Custom Post Type

custom-post-type.php

public function register_video_type() {
    $labels = array(
        'name' 			=> _x('Video', 'post type general name'),
        'singular_name' 	=> _x('Video', 'post type singular name'),
        'add_new' 		=> _x('Add New', 'section'),
        'add_new_item' 		=> __('Add New Video'),
        'edit_item' 		=> __('Edit Video'),
        'new_item' 		=> __('New Video'),
        'all_items' 		=> __('All Videos'),
        'view_item' 		=> __('View Video'),
        'search_items' 		=> __('Search Videos'),
        'not_found' 		=> __('No videos found'),
        'not_found_in_trash'    => __('No videos found in Trash'),
        'parent_item_colon'     => '',
        'menu_name' 		=> 'Videos'
    );
    $args = array(
        'labels' 		=> $labels,
        'public' 		=> true,
        'has_archive' 		=> true,
        'menu_position'	 	=> 3,
        'supports' 		=> array('title', 'editor', 'comments'),
        'taxonomies' 		=> array('category'),
    );
    register_post_type('video', $args);
}

add_action( 'init', 'register_video_type');