Yeah I could see a teacher submitting this paperwork as a way of essentially calling out the absurdity and bigotry of Florida's recent education laws through malicious compliance
I don't want my got danged kid being read to by no god damned BLACK
A generous reading of this could be that it’s one of the classic 20th century books that may involve a lot of racism, violence, usage of the n word, and they don’t want parents to be surprised if they hear talks about their kid saying the N word multiple times out loud
But this is Florida. The government would pass a law mandating every white resident to say the N word once a week if they could, so the permission slip is likely not that.
I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy: