"my First Amendment rights by having YouTube pull down my clip."

Now if he had been hosting it himself and they went to his ISP I would have more sympathy.

While "suckup" and "bald faced lair" is "criticism and/or comment", without the context provided at HA it might have looked more like libel standing alone on YouTube. However, since I didn't see the YouTube version I don't know what he said in the description, and since to see it at the current host (rather than a window at HA) one has to install some sort of crap on ones computer, I don't know what sort of description he has at the current host either.