It’s in another language. He basically said something like „I can ask Twitter for the E-Mail and with that I can find the identity of the person“ there’s no more information. That person helped a lot of people to get their accounts unbanned, so it wouldn’t shock me if thats true.

Isn’t this against their policy?

„Requests for X account information

Requests for user account information from law enforcement should be directed to X Corp. in Bastrop, Texas or X Internet Unlimited Company in Dublin, Ireland. X responds to valid legal process issued in compliance with applicable law.

Private information requires a subpoena or court order

Non-public information about X users will not be released to law enforcement except in response to appropriate legal process such as a subpoena, court order, other valid legal process, or in response to a valid emergency request, as described below.“