WordPress Custom Post Type Boilerplate (e.g. Videos)

videos.php

<?php
/*
Plugin Name: Videos
Plugin URI: 
Author: Dave Rupert
Author URI: http://www.daverupert.com
Description: A custom post type that adds videos and custom taxonomies.
Version: 1.0
*/

# This is a Custom Post Type Boilerplate.
# In order to change the post type, change the initial call, the Class name, the variables, and the first function name.
# Also change the Taxonomies and the Custom Metabox as necessary.

new VideoPostType;		// Initial call

class VideoPostType {
	
  var $single = "Video"; 	// this represents the singular name of the post type
  var $plural = "Videos"; 	// this represents the plural name of the post type
  var $type 	= "video"; 	// this is the actual type

	# credit: http://w3prodigy.com/behind-wordpress/php-classes-wordpress-plugin/
	function VideoPostType()
	{
		$this->__construct();
	}

	function __construct()
	{
		# Place your add_actions and add_filters here
		add_action( 'init', array( &$this, 'init' ) );
		add_action('init', array(&$this, 'add_post_type'));
		
		# Add image support 
		add_theme_support('post-thumbnails', array( $this->type ) );
		add_image_size(strtolower($this->plural).'-thumb-s', 220, 160, true);
		add_image_size(strtolower($this->plural).'-thumb-m', 300, 180, true);

		# Add Post Type to Search 
		add_filter('pre_get_posts', array( &$this, 'query_post_type') );

		# Add Custom Taxonomies
		add_action( 'init', array( &$this, 'add_taxonomies'), 0 );

		# Add meta box
		add_action('add_meta_boxes', array( &$this, 'add_custom_metaboxes') );

		# Save entered data
		add_action('save_post', array( &$this, 'save_postdata') );

	} 
	
	# @credit: http://www.wpinsideout.com/advanced-custom-post-types-php-class-integration
  function init($options = null){
  	if($options) {
	    foreach($options as $key => $value){
	      $this->$key = $value;
	    }
    }
  }

	# @credit: http://www.wpinsideout.com/advanced-custom-post-types-php-class-integration
	function add_post_type(){
    $labels = array(
      'name' => _x($this->plural, 'post type general name'),
      'singular_name' => _x($this->single, 'post type singular name'),
      'add_new' => _x('Add ' . $this->single, $this->single),
      'add_new_item' => __('Add New ' . $this->single),
      'edit_item' => __('Edit ' . $this->single),
      'new_item' => __('New ' . $this->single),
      'view_item' => __('View ' . $this->single),
      'search_items' => __('Search ' . $this->plural),
      'not_found' =>  __('No ' . $this->plural . ' Found'),
      'not_found_in_trash' => __('No ' . $this->plural . ' found in Trash'),
      'parent_item_colon' => ''
    );
    $options = array(
      'labels' => $labels,
      'public' => true,
      'publicly_queryable' => true,
      'show_ui' => true,
      'query_var' => true,
      'rewrite' => array('slug' => strtolower($this->plural)),
      'capability_type' => 'post',
      'hierarchical' => false,
      'has_archive' => true,
      'menu_position' => null,
      'supports' => array(
      	'title',
      	'editor',
#      	'author',
      	'thumbnail',
#      	'excerpt',
      	'comments'
      ),
    );
    register_post_type($this->type, $options);
  }

	
	function query_post_type($query) {
	  if(is_category() || is_tag()) {
	    $post_type = get_query_var('post_type');
		if($post_type) {
		  $post_type = $post_type;
		} else {
		  $post_type = array($this->type); // replace cpt to your custom post type
	  }
	  $query->set('post_type',$post_type);
		return $query;
	  }
	}

	function add_taxonomies() {
	  register_taxonomy(
	  	'topic', 
	  	array($this->type), 
	  	array(
		    'hierarchical' => true,
		    'labels' => array(
		    	'name' => __( 'Topic' ),
		    	'singular_name' => __( 'Topics' ),
		    	'all_items' => __( 'All Topics' ),
		    	'add_new_item' => __( 'Add Topic' )
		  	),
		  	'public' => true,
		    'query_var' => true,
		    'rewrite' => array( 
		    	'slug' => 'topic' 
		    ),
		  )
		 );

	}

	# @credit: http://wptheming.com/2010/08/custom-metabox-for-post-type/
	function add_custom_metaboxes() {
    add_meta_box( 'metabox1', 'Details', array( &$this, 'metabox1'), $this->type, 'normal', 'high' );
	}

	# @credit: http://wptheming.com/2010/08/custom-metabox-for-post-type/
	function metabox1() {

	  global $post;
	  extract(get_post_custom($post->ID));

	  wp_nonce_field( plugin_basename(__FILE__), 'noncename' );  // Use nonce for verification
	?>
		<p>
	  <label for="data[short_title]">Short Title</label>
	  <input type="text" id= "data[short_title]" name="data[short_title]" value="<?php echo $short_title[0] ?>"  placeholder="5-6 Word Title" size="100" />
	  </p>

		<p>
	  <label for="data[video_url]">Video URL</label>
	  <input type="url" id= "data[video_url]" name="data[video_url]" value="<?php echo $video_url[0] ?>"  placeholder="http://example.com/path/to/my/video.mov" size="100" />
	  </p>
	  <style type="text/css">
	  	#metabox1 label { 
	  		width: 120px; 
	  		display: -moz-inline-stack;
	  		display: inline-block;
	  		zoom: 1;
	  		*display: inline;
	  	}
	  	div.tabs-panel {
	  		height: 80px!important;
	  	}
	  </style>
	<?php
	}


	function save_postdata(){
	  if ( empty($_POST) || $_POST['post_type'] !== $this->type || !wp_verify_nonce( $_POST['noncename'], plugin_basename(__FILE__) )) {
	    return $post_id;
	  }
	  
	  if ( defined('DOING_AUTOSAVE') && DOING_AUTOSAVE ) 
    	    return $post_id;

	
	  // Check permissions
	  if ( 'page' == $_POST['post_type'] ) {
	    if ( !current_user_can( 'edit_page', $post_id ) )
	      return $post_id;
	  } else {
	    if ( !current_user_can( 'edit_post', $post_id ) )
	      return $post_id;
	  }

		if($_POST['post_type'] == $this->type) {
			global $post;
			foreach($_POST['data'] as $key => $val) {
				update_post_meta($post->ID, $key, $val);
			}
		}
		
	}
	
}

Hey Dave,
I hope you can help. I know you created this long ago, but I LOVE this boilerplate video plugin. I've created a relative url path so I can grab videos we host on Amazon s3 with a simple file title.

I added an array to the meta box function to include posts (below), so the meta boxes show up on the post edit page, however, they are not saving. I assumed it was nonce issue but could be wrong.

' add_meta_box( 'metabox1', 'Details', array( &$this, 'metabox1'), array($this->type, 'post'), 'normal', 'high' );
}
'

Here's the whole plugin. Pretty please lend your thoughts or guidance.
https://gist.github.com/reinnovating/dfbc9f4767b22edb996b3657aeb156e6

Hey Mate,

You have done a great job for creating this custom plugin for videos and custom taxonomies. I am looking for a way to create a custom post type with restriction on user accounts like:
Allowing students to take quiz and video lectures but doesn't allow to overwrite anything on dashboard.

Whereas
Teachers can upload MCQS base quiz and video lectures,

I have created the WordPress custom post type but I am not sure how we can restrict specify user from doing any action like overriding the content.

I hope you can suggest me any valid way to acheieve this task. Thanks in advance.