I don't think there's really a free vpn. Because unlike movies/tv or games that can be infinitely copied with basically zero cost, VPN is a service that requires constant electricity, internet connection, and eventually the hardware that the VPN runs on needs to be replaced. There's ProtonVPN that have a free version has limited servers to choose from and intended for people living in authoritarian countries to bypass censorship, therefore it blocks all P2P connections.

Well there CalyxVPN, provided by the Calyx Institute, a non-profit. P2P doesn't appear to be blocked, but the download speeds are slow as a snail. It'd take a day just to download a movie with 2GB file size. This VPN is supposed to be for educational purposes so like torrenting seems to be not in the spirit of what its supposed to be for, but like nothing is stopping you from using it.

There's also many cheap vpns that cost only like 2-3 US dollars a month but it seem like those require you to pay upfront for an entire year which would average out to be 2-3 US dollars a month.

And there are also many direct download options when it comes to piracy, those will usually not get you in trouble, since your IP wouldn't be a part of a swarm so theres nothing for copyright trolls to report on.