Managed to find a solution to my own question
<?php
$newscategory = ‘1’;
$args = array(
‘posts_per_page’ => ‘8’,
‘category__in’ => $newscategory,
no_found_rows’ => true,
‘meta_query’ => array(
array(
‘key’ => ‘post_video’,
‘value’ => ”,
‘compare’ => ‘!=’
)
)
);
?>
The error message on screen is:
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