I saw this the other day on someone's Facebook page, and had a mild laugh. It looks like a lark. But when I look closer and with more intent, I notice what the two contestants do ... or rather, what they DON'T do ... when they finally make contact with the other one. They don't use their non-striking hand to maintain contact with ... locate, control ... their opponent.
I suppose fighting blindfolded is no different, really, than fighting in the dark, or fighting when you have a face full of sand or scotch (depending whether you get ambushed at the beach of the bar).