Nextcloud flow: trigger only for files inside a specific folder

I’m Trying to setup a workflow (with external_script as flow) and my idea is to trigger a script everytime a file gets a tag and it is inside a specific folder (Videos/AutoCompression).

My actual flow setup is the following:

the regex is /\/Videos\/AutoCompression\/.+$/i.

I tried every combination (File Name/Request URL and is/matches) but it doesn’t work. If I remove this condition the flow works.

What is wrong here?