The .txt file (or the video) tells you to copy a specific "verification script."
Here is a blog post looking at the risks and how to stay safe.
Instead of activating software, you have just manually installed malware , such as "Lumma Stealer," which can steal your passwords, credit card info, and crypto wallet details. Red Flags to Watch For
Why You Should Never Open "Download Activation 193 days left.txt"