[quote=@Archmage MC]
<Snipped quote by Absolis>

If it ever happens to one of your videos over something thats public domain, like say... Beethoven's 4th or other classical music, just appeal and say you WILL go to court if they strike it again. You can easily get a newer lawyer on your side for an easily won public domain case and incur no court costs due to the other party being countersued for like 5K plus court fees.
[/quote]

Thats the thing. Vocaloid is a tricky subject, because the program is public domain, but the music isn't always public domain. Bands use the program with the music they create. So it's not technically public domain being pulled. Rather, it's copyrighted works being pulled down from official sources (such as the band's own YouTube channel) by fraudulent claims.