Variable $featured_video_url does not exist

In Thing.php, $featured_video_url initialized within a conditional. However, it is accessed outside of that conditional.

Updating /lib/HunchSchema/Thing.php
to return if the get_the_post_video_url function doesn’t exist seems to do the trick

if ( function_exists( ‘get_the_post_video_url’ ) ) {
$featured_video_url = get_the_post_video_url();
}
else {
return;
}