Check list
Apache is present
PHP 8.1.32 is present.
php-curl module is present.
php-gd module is present.
php-json module is present.
php-mbstring module is present.
php-mysqli module is present.
php-zip module is present.
php-zlib module is present.
Your videos directory is writable
Your post_max_size is 500M
Your upload_max_filesize is 500M