Redirect event links to Eventbrite.com

example.php

<?php

/*
 * This changes the event link to the Eventbrite URL if that is set.
 */
add_filter( 'tribe_get_event_link', 'my_set_eb_link', 100, 2 );
function my_set_eb_link ( $link, $postId ) {
	$eventbrite_id = get_post_meta( $postId, '_EventBriteId', true );
	// Only swaps link if set
	if ( !empty( $eventbrite_id ) ) {
		$link = 'https://www.eventbrite.com/edit?eid=' . $eventbrite_id;
	}
	return $link;
}