Classic_Editor::add_meta_boxes()

	public function add_meta_boxes(){
		global $post;
		if( ! $post ){
			return;
		}

		$_post = Helper::get_video_post( $post );
		// video post specific meta boxes
		if( $_post->is_video() ){
			add_meta_box(
				'cvm-video-settings',
				__( 'Video settings', 'codeflavors-vimeo-video-post-lite' ),
				[ $this, 'post_video_settings_meta_box' ],
				$post->post_type,
				'normal',
				'high'
			);

			add_meta_box(
				'cvm-show-video',
				__( 'Live video', 'codeflavors-vimeo-video-post-lite' ),
				[ $this, 'post_show_video_meta_box' ],
				$post->post_type,
				'normal',
				'high'
			);
		}else {
			/**
			 * Filter to disable the shortcode metabox in Classic Editor.
             *
             * @param bool $allow   Allow the shortcode meta box (true) or disable it (false).
			 */
		    $allowed = apply_filters( 'vimeotheque\classic_editor\show_shortcode_meta_box', true );

		    if( true === $allowed && post_type_supports( $post->post_type, 'editor' ) ) {
			    // Shortcode meta box
			    add_meta_box(
				    'cvm-add-video',
				    __( 'Vimeotheque shortcode',
					    'codeflavors-vimeo-video-post-lite' ),
				    [ $this, 'post_shortcode_meta_box' ],
				    null,
				    'side',
				    'low'
			    );
		    }
		}
	}