^^^I remain surprised that no one has gone after fan films for distributing/using music they don't have rights to.
Well, the fan films don't have the rights to anything
connected to Star Trek
-- the title, the character names, the designs, any of it. It's all technically illegal. But the studio has historically tolerated fanfiction as long as its makers don't try to profit from it, because Roddenberry convinced them that it would help maintain audience interest in the property.