Disable related videos in CoursePress youtube featured video

code.php

<?php

add_filter( 'oembed_result', function( $embed, $url, $args ) {
    
    $url_string = parse_url( $url, PHP_URL_QUERY );
    parse_str( $url_string, $id );
    if( isset( $id['v'] ) )
    {
        return str_replace( '?feature=oembed', '?feature=oembed&rel=0', $embed );
    }
    
    return $embed;
}, 99, 3 );