Search Inside Woocommerce Product Description -- 2

Hi,

What is needed:
My Woocommerce products each has a unique text inside the description.
The unique word is located inside a shortcut tags.

For example:
[FORMZ]UNIQUE_WORD[/FORMZ]

I need a script to take the UNIQUE_WORD from each product put into CSV one below the other.

There are a total of over 50000 products.
* Avoid timeouts
** Possibly with root access

I cannot provide site access or FTP access, you must do this on your local server.

Any reply without:
" I have fully read and understood what needs to be done and I can do it on my local server " will be ignored