We have something similar in France for more than a decade. As you are torrenting, you are obviously sharing your ip with other torrent clients and this is where they get you. The agency (used to be called Hadopi but they change their name and can’t recall the new one) is following some torrents, gets your ip from torrent clients and then ask internet provider to give name/address. You then received a warning letter, upon 3 letters received, you can get a fine or go to court.

No, there isn’t aac video . Your post mixed up, You are confusing audio and video codec and don’t give any details for people to help you out. Instead of ranting, ask for help with details (we are not on Reddit)