External WP_Query call from PHP crashed after version update

The problem is that you’re trying to do your work in a stand alone PHP, this will always be fragile, and it poses a security risk!

Use a Cron Job Instead

This will trigger your code to run hourly:

add_action( 'init', function() {
    // If the cron job hasn't been scheduled
    if ( ! wp_next_scheduled ( 'binyomins_cron_job' )) {
        // schedule it to fire an event every hour
        wp_schedule_event( time(), 'hourly', 'binyomins_cron_job' );
    }

    // Run the video update function every time the cron event happens.
    add_action( 'binyomins_cron_job', 'binyomin_video_update' );
});

function binyomin_video_update(): void {
    // .... your code goes here
    // The Query
    $args = array(
        'post_type' => 'post',
        "posts_per_page" => 1,
....... etc
}

You can change it to run daily, or even register your own schedule.

You could also swap out the scheduled cron with a single event if you chose, running it via cron tools such as WP CLI or the WP Crontrol plugin.

Where Does That Code Go?

Anywhere hooks and filters usually go, a plugin, a functions.php, etc