The same video also says that BLUE players in strategy games win more often because their mindset becomes more focussed on long term goals. Red players win more in First Person Shooters. While I'm unsure about 40K, I do believe warhammer is more a strategy game than an FPS.
but warhammer and other table top games are also about threat assessment, so will a Red Land raider be seen as more threatening then a blue one and therefore will it's destruction be valued higher then it other wise should be? would a bright red army make a opponent play more conservatively then he should? or will he be more aggressive against a blue army?