The video does look like he goes in for the bite, but with just that one angle its hard to tell 100% cause he has his back to the camera. Kennedy and the ref reacted to it, so I'm guessing there probably was a bite.

As for Kennedy, not the way he'd have wanted to end it, but Camacho had just been cut, and Kennedy was countering well. Style-wise, I'd want him not to fight with his mouth open so much, and maybe keep his guard up a bit more. Not seen him before, and hard to tell from that how decent he might be.