Earlier quoted context omitted.
The sentence before says > As the owner of the copyright in the games: Mario Kart 8, Super Mario World, and Pokémon, Nintendo has the exclusive right to perform the games publicly (Which is all I said they were wrong to claim.)
And then you skipped the rest of the email, in which they said people are free to playback their games after they've signed an agreement stating they won't do it using pirated versions of the game. >Nintendo encourages fan engagement on YouTube through the Nintendo Creators Program. Under the program, participants are granted a license to use Nintendo’s characters, games, and other intellectual property, subject to t…
http://forums.shamusyoung.com/viewtopic.php?p=31058#p31058
Which (allegedly - I'm not a Japanese lawyer) quotes Japanese law -
> In Japan, "Works can be performed or exhibited freely if the performer is not remunerated, and the audience is not charged an admission fee." The source must be cited (Nintendo, or whatever).
Also (allegedly) Canadian law -
> In Canada, it is explicitly stated in 29.21 (1) It is not an infringement of copyright for an individual to use an existing work and disseminate fan created works.