I see blending and redirection. I would have to feel it to see if it indeed collides. It may just be another use of the word. I see no clash.
Well.. IMHO I see slow but tremendous power is moving directly toward uke. There is clash but Endo shihan is matching the incoming force from uke. Since the shihan is doing so, the uke can't enter and moving around. Then the shihan can take the balance of the uke easily by blending if he wants. I think there is another video Endo shihan is using a towel to explain about the connection between nage and uke. It's the same thing like that.