The new Just Dance game allows for users to download songs and store them locally now, but they are stored in the Nintendo/saves folder on the sd card. These are stored as NAX0 files. I have tried using hactool but because of the sdpath not being in the registered folder I'm not sure how to...
Sure, if you really want/"need" the highest quality there is you can grab remuxes. But will be pretty big file sizes, so disks can be better in that regard.
But piracy is free so...
some bluray rips are kinda crappy, remuxes are a more safe bet, but i usually don't have trouble finding a good rip, there are certain groups to avoid and some to look out for