The youtube video looks like the author was able to hack roms to the WII from his PC.
Check out wiiroms website, they got whole bunch of stuff on downloading roms to wii and all kinds of wii rom hacks!
Virtual Console.info – nWii VC Game Reviews and Free Games. downloadable access to titles originally released for Nintendo 64 (N64), the Super Nintendo Entertainment System (SNES) and even the Nintendo Entertainment System (NES). also will feature a “best of” selection from Sega Genesis (SEGA) titles and games from the TurboGrafx console (a system jointly developed by NEC and Hudson). It also will be home to new games conceived by 3rd party indie developers whose creativity is larger than their budgets and hopefully homebrew comunity with free PD roms.
You might also want to check out emuwii too for more rom hacks.