Okay, I am not a lawyer, but
this right here seems like some supreme bullshit to me.
Fan videos and
games that use characters and/or clips from the actual show are one thing, whether they are monetized or not, but I don't see how Hasbro can have any claim whatsoever on original music that is merely inspired by the show. If actual sound clips from the show are being used in the songs, or if the music in question is a remix of one of the songs from the show, then yeah, maybe then they have a case, but in some of the ones being hit by this, that's not the case at all. And if, as EQD surmises, it's actually because of the pony images in the videos associated with the music, rather than the music itself, then why does the claim mention "audio content" to which Hasbro should have zero right to claim (in my non-lawyer-ish opinion, at least), given that they had zero creative input into it?
Again, I am not a lawyer, so if someone wants to explain how I'm talking out of my ass here, then feel free. I won't be mad (assuming, of course, that I am actually, demonstratively talking out of my ass here).
(EDIT)
Then again, if Hasbro is
trying to copyright the term "brony" (the news for which somehow completely eluded me until now) or
whatever the hell is happening there, then they'll fucking try anything, I guess. *facepalm*
(/EDIT)