I've already stated this many times, I'll state it again.
Get your shit out of YouTube and any other Google product.
Google is a dumb, faceless, fully automated company only interested in extracting as much data as possible from its users, force them to swallow as many ads as possible, all without caring about listening to them (both consumers and creators), under the faulty assumption that they're too big for users and consumers to live without them. They simply don't deserve anybody using their shitty products anymore.
The error in this case is quite obvious. YouTube's scanner incorrectly identified the teacher's recording of Moonlight Sonata as a copyrighted reinterpretation of the same piece of music originally written by a guy who actually died 200 years ago. And I can't completely put the blame on Google's AI: the notes are technically the same, the beat might also be the same, if you calculate an FFT of the audio you'll probably also come up with similar spectral signatures. But a human listener will IMMEDIATELY notice that was played by the teacher IS NOT the the same as the copyrighted piece of music.
The problem is: who is accountable for these mistakes? Who shall I reach out to if Google's foggy algorithms make a mistake? And, in the case of educators and creators who actually do that for a job, who will compensate them for the revenue they have lost because of algorithmic errors?
Until Google can provide an answer to these questions, I repeat: keep your ass away from anything that has their name on it. They are not reliable, the risk of losing your data, your account or your followers because of random automated decision is very high, and the probability of getting a real human to assist you is very low.