Something you can do is tell @TeamYouTube that you stand with the BlackTruth, and want ProfBlackHQ reinstated. Tell them you recognize YouTube is hostile (perhaps illegally so) to any views they don't personally agree with and censor users behind the false claim of "hate speech."
@TeamYouTube The professor has not broken any rules and it's unfair to ban him because you do not share his views. We kindly and humbly ask that you please reinsate the professor's acct. Show that you are fair to all, even if you disagree with their positions.