Being disappeared definitely has connotations of political prisoners and actual government censorship to me. Not a private company deciding not to host your videos for free any more.
But brainwashing doesn't? I really don't see the issue here. "Carted off", "Political assassination", there hundreds, if not thousands, of phrases that are used that have innocuous meanings far beyond any singular event and are used regularly by people of all backgrounds in many contexts. And I don't see why the usage being applied to video hosting somehow detracts from a completely unrelated event