1st video; That kid is just retarded.. I mean, he's way to addicted to Halo. He uses cardboard/tape way too much. Has no friends (I'm guessing but I'm pretty damn sure!)
2nd Video: He can't pronounce R? Weird. Anyways he says, fwour, fwiens, devow may cwy.... It's not a accent. It's just, he's mentally handicaped (i think)