Bring the content from all post types into tag/author/tax pages.

theme_stuff.php

<?
/**
 * Add different content types to the main queries.
 * This will bring posts, craft, projects, video into the main query. Allows for better archive pages.
 * @return string Main category name.
 */
// TODO: Bring in reviews.
function make_add_custom_types( $query ) {
    if ( ! is_admin() && $query->is_main_query() && ( $query->is_tag() || $query->is_author() || $query-> is_tax() ) && empty( $query->query_vars['suppress_filters'] ) ) {
		$query->set( 'post_type', array( 'post', 'craft', 'projects', 'video' ));
		return $query;
	}
}
add_filter( 'pre_get_posts', 'make_add_custom_types' );