Get a plastic editing tool like a Dremel with a small cutting disc make a cutout for the fan but make it a bit smaller than the fan so that you can use the screwholes of the fan.
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