I'd like to point out that the legality of sharing is not determined by the fact that it's available as a torrent or that the torrent has been posted on a specific site.
I couldn't find the details about the licensing of Gangnam Style, but your argument seems to be that it's not "free" (an almost uselessly vague term in this context) because it's on TPB.
I couldn't find the details about the licensing of Gangnam Style, but your argument seems to be that it's not "free" (an almost uselessly vague term in this context) because it's on TPB.