I actually thought it was a video which was taken down within maybe an hour of it going up. There's obviously nothing wrong with it, and I seriously doubt that an actual human reviewed the content when you appealed.
I can't think why it would've been flagged, unless you were being tactically mass reported by a group of people or youtube is cracking down on unsanctioned political content by allowing its automated moderation algorithms to be heavy handed with smaller creators. In combination with the equally false COVID misinformation strike it's fishy to me.
All in all, I can understand why you're both pissed and worried. You're essentially working for google and instead of offering job security, they're offering job insecurity. Neither willing to apply their apparently highly flexible rules fairly across all users nor tell you what you might've done wrong (which would be difficult because by any objective human standard, it's nothing).
Yeah, it's some bonkers stuff.