"Freedom of speech is the political right to communicate one's opinions and ideas using one's body to anyone who is willing to receive them."
"the right to express facts and opinions subject only to reasonable limitations (as the power of the government to protect itself from a clear and present danger) guaranteed by the 1st and 14th amendments to the U.S. Constitution and similar provisions of some state constitutions"
"The right to express any opinions without censorship or restraint."
I am capable of communicating the entirety of my ideas and opinions without having to copy someone else's work.
So despite ACs rudeness, I don't consider him/her to be wrong about free speech.
But I could be wrong under the Oxford definition because it really depends what entails a "restraint", and being restrained by not being able to reproduce someone;s work could count. But by uploading torrents of the latest movies, I'm not really expressing any opinion to begin with. To actually express something, one would need to cut and add commentary about the movie expressing an actual opinion, which would then fall under "fair use" for most purposes.
The Merriam Webster entry seems to say that freedom of speech can be defined by the government, which I consider absurd.
The Wikipedia entry specifically says "using one's body", so under that definition, breaking movie copyright certainly doesn't count. Doing a rendition of "happy birthday" could count as free speech that is stopped by copyright law imo.