YouTube's AI driven AI detection system has flagged stop animation and human made videos as AI incorrectly.
What are we doing?
YouTube pays about $1 per 1000 views. (This varies a great deal) That's not enough to expect accuracy unless it's done out of love for the topic.
Many videos try to look like content made out of love, but it's a business. You have not stumbled across someone who is just "so excited" to share what they have learned.