add_action( 'pre_get_posts', function( $query ){
    if( $query->is_archive() && $query->is_main_query() ){
        $query->set( 'post_type', array( 'post', 'video' ) );
    }
}, 10, 1 );
/**
 *
 * Filter the Archive widget
 *
 */
add_filter( 'widget_archives_dropdown_args', function( $args, $instance ){
    return array_merge( $args, array(
        'post_type' =>  'video'
    ) );
}, 10, 2 );

/**
 *
 * Filter the Category widget
 *
 */
add_filter( 'widget_categories_dropdown_args', function( $args, $instance ){
    return array_merge( $args, array(
        'taxonomy'      =>  'categories',
        'value_field'   =>  'slug',
        'class'         =>  'video-category-select'
    ) );
}, 10, 2 );

add_action( 'wp_footer', function(){
    ?>
    <script type="text/javascript">
        jQuery( '.video-category-select' ).on( 'change', function(e){
            var slug = jQuery(this).val();

            window.location.href = '<?php echo trailingslashit( home_url( 'categories' ) ); ?>' + slug;
        } );
    </script>
    <?php
} );

add_filter( 'widget_text', function( $text ){
    return do_shortcode( $text );
}, 10, 2 );