Care to explain why Nintendo are the only people to have this stance?
Now, I feel I must inform you that it isn't just Nintendo trying to claim (c) on their stuff, they're just the worst and most prominent.
I have gotten (c) notices for Ape Escape 1
videos because the composer, Soichi Terada, apparently filed (c) stuff for some of the songs he composed. Which again, I don't mind as I really love the guy's work.
Classic Mega Man games (Not so much the X series though for some reason) has also gotten (c) notices on my channel, which isn't so bad except for the fact it bans the videos in Germany, so my german fans (If I have any) are left in the dust. I take more issue with THAT than losing out on a pittance in ad revenue.
Other series that seem to have (c) notices (Mainly due to the music, mind) include Disgaea, Jet Set Radio, Kingdom Hearts (Mainly anything with Utada Hikaru), Spyro The Dragon, Katamari, RareWare, Grand Theft Auto, Sonic The Hedgehog(Seems to be mainly for modern ones as opposed to the older ones, though), Crash Bandicoot 2: N-Tranced (Yes this one specific game in the series), and Ace Attorney, based on videos claimed on my channel at least. I'm sure others can chime in. I heard Microsoft had some wierd policy about Xbox games?