> YouTube deleted the channel without warning, and (apparently) erased all my content without backup.
> I'm sharing my horror story so that others know what can happen if you trust YouTube and Google to use ordinary common sense and responsibly safeguard your audio-visual material.
It's all too unfortunate that most people start caring about backups from that one time when they needed them but didn't have them.
Nice.
IIRC, "education" is specifically mentioned as fair use.