Searching for "2021" as a timestamp is a tactic to find directories last updated during that year, implying the files were likely still alive and not yet purged by server admins or copyright bots.
These games, along with lesser-known gems, are commonly found in complete, curated ROM sets available on platforms like the Internet Archive . Choosing the Best N64 Emulator in 2021
By 2021, the community's approach to indexing these files matured significantly:
You load the ROM file into the emulator. Then, you can play the game on your PC, phone, or tablet. You can even plug in a modern controller to play. Staying Safe and Legal
[ ROM File (Game Data) ] + [ Emulator (Virtual Console) ] = [ Playable Game on Modern Device ]