This is kind of cute but also really boring so far. Sounds more like it's fit for some kind of 'How we make games at Nintendo' documentary than an E3 presentation.
so now there are two players. there are two yoshis. one yoshi is green. and the other is red. these players work together to overcome challenges. the can do this with their powers. one of these powers is their tongues. they can use their tongues to aid each other. by having two players, two people can have fun together.