How is it the fault of that youtube channel? They may genuinely want to protect their reverb'd rendition of the Moonlight Sonata, which is technically their right even if it's stupid.
Then it's purely google's fault that their AI contentid scanner can't distinguish between Wicca Moonlight and some other arbitrary performance of the sonata. It's google's fault that their AI doesn't understand that the sonata itself is in the public domain so they have to only match against exact reproductions rather than "kinda sounds the same because same notes and instruments" reproductions.
Then it's purely google's fault that their AI contentid scanner can't distinguish between Wicca Moonlight and some other arbitrary performance of the sonata. It's google's fault that their AI doesn't understand that the sonata itself is in the public domain so they have to only match against exact reproductions rather than "kinda sounds the same because same notes and instruments" reproductions.