I think that view shows pretty definitively that Hoyer didn't start sliding until it was too late. So in that respect, it was a legal hit, and the whiners in Ohio have no argument.
Now, whether it was helmet-to-helmet is another story. But again, Kiko was low from the beginning, and Hoyer decended into the hit. He'll probably get fined for it, but from this obviously biased perspective, I think it was legitimate.
I also think the hit on Manuel was legitimate. I think the Cleveland players and fans are a bunch of classless whiners, however.