add_filter(
    'wpf_crm_object_type', function() {
        return 'Videos';
    }
);

$video_data = array(
    'fieldOne' => 'valueOne',
    'fieldTwo' => 'valueTwo',
);

$video_id = wp_fusion()->crm->add_contact( $video_data );

if ( is_wp_error( $video_id ) ) {
    error_log(print_r($video_id, true));
    return;
}

add_filter(
    'wpf_crm_object_type', function() {
        return 'Contacts';
    }
);

$contact_data = array(
    'First_Name'  => 'firstname',
    'Last_Name'   => 'lastname',
    'Email'       => 'email@domain.com',
    'Cust_Videos' => array( $video_id )
);

$contact_id = wp_fusion()->crm->add_contact( $contact_data );

if ( is_wp_error( $contact_id ) ) {
    error_log(print_r($contact_id, true));
    return;
}