Most of the datamined Smash music videos appear to have been copyright claimed now, and any that still aren't probably will be soon. Despite the inconvenience of not being able to listen to said music as easily for now (Ridley's new remix and such), I'll take it if it means there's less World of Light spoiler videos on youtube at this time since they'll just get copyrighted claimed sooner or later.
What I'm most livid about at the moment is ROM's of Smash Ultimate being given out online for people to illegally download and pirate/play for free. The game won't lose that much money/sales from people over this, but still, gotta draw the line somewhere. Datamining the game and revealing all the music, spirits, etc this soon was already crossing the line for some.