Change the notification message of Post Submission

Use these two filters

$subject = apply_filters('videopro_post_submission_user_notification_subject', $subject);

and

$message = apply_filters('videopro_post_submission_user_notification_message', $message, $video_permalink);

Following these steps

1. To change the subject of the message, add these lines into /functions.php of your child theme

   add_filter('videopro_post_submission_user_notification_subject','my_post_submission_subject_filter', 10, 1);
   function my_post_submission_subject_filter($subject){
   $new_subject = 'Your post submission has been approved';
   return $new_subject;
   }
   

2. To change the content of the message, add these lines into /functions.php of your child theme

   add_filter('videopro_post_submission_user_notification_message', 'my_post_submission_content_filter', 10, 2);
   function my_post_submission_content_filter($message, $video_permalink){
   $new_content = 'Congratulation! Your submission has been approved. You can see it here: ' . $video_permalink;
   return $new_content;
   }
   

3. Change the text as you wish.