Many of the game developers have released statements about this ****storm that has been thrown on content creators by YouTube and stated that many of these claims are not from them and they are from a automated system so if you do get a claim against you contact the developers...
Deep Silver: http://www.twitlonger.com/show/n_1rtdre5
Paradox Interactive: http://forum.paradoxplaza.com/forum/content.php?1698-Monetizing-from-Youtube-videos-containing-Paradox-Interactive-material!
The only advice I can offer is to check your terms of service on the games you want to make videos on and to dispute any claims you may get that are fake.
Bossa Studios: http://www.youtube.com/watch?v=Adtd4sVecbg
Devolver Digital: http://canipostandmonetizevideosofdevolvergames.com/
We can only sit back and wait to see what is going to happen with youtube and if it gets any worse...
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