I just realized I put these in backwards order...Zebra,I change my statement of agreeance with you. In the top clip, B10's contact is with his chest into the side of A98. The only question I would have is, since the QB is now classified as 'defenseless' how far does that protection last? To me, he is making an attempt on the ball here and loses that.
Second clip, to me, that looks like a crouch and thrust to the helmet.