При попытке отправки больших файлов такая ошибка:
The requested resource
/core/addvideo.php
does not allow request data with POST requests, or the amount of data provided in the request exceeds the capacity limit.
В .htaccess прописал:
php_value client_max_body_size 1000M
php_value limit_request_body 1000M
php_value post_max_size 1000M
php_value upload_max_filesize 1000M
php_value max_execution_time 1800
php_value max_input_time 1800