How to Hide Youtube Showcase Admin Menus

function plt_hide_youtube_showcase_menus() {
	//Hide "Videos".
	remove_menu_page('edit.php?post_type=emd_video');
	//Hide "Videos → All Videos".
	remove_submenu_page('edit.php?post_type=emd_video', 'edit.php?post_type=emd_video');
	//Hide "Videos → Add New".
	remove_submenu_page('edit.php?post_type=emd_video', 'post-new.php?post_type=emd_video');
	//Hide "Videos → Categories".
	remove_submenu_page('edit.php?post_type=emd_video', 'edit-tags.php?taxonomy=category&post_type=emd_video');
	//Hide "Videos → Tags".
	remove_submenu_page('edit.php?post_type=emd_video', 'edit-tags.php?taxonomy=post_tag&post_type=emd_video');

	//Hide "Video Settings".
	remove_menu_page('youtube_showcase');
	//Hide "Video Settings → Getting Started".
	remove_submenu_page('youtube_showcase', 'youtube_showcase');
	//Hide "Video Settings → Glossary".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_glossary');
	//Hide "Video Settings → Settings".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_settings');
	//Hide "Video Settings → YouTube API".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_youtube');
	//Hide "Video Settings → Shortcodes".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_shortcodes');
	//Hide "Video Settings → Forms".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_forms');
	//Hide "Video Settings → Plugins".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_store');
	//Hide "Video Settings → Support".
	remove_submenu_page('youtube_showcase', 'youtube_showcase_support');
}

add_action('admin_menu', 'plt_hide_youtube_showcase_menus', 11);

Where do I put this code?