Maybe I'll post a vid of a red claw crab getting destroyed by one of my prawn. Just kidding.
In all honesty, I've never seen red claw crabs as that scary of a predator. The wholesale I worked at would get them in by the hundreds and they never held up well. Didn't seem like a very good pet to keep. That said, your vid of the crab eating the frog is interesting. My question would be why did you put that frog in there? Seems inhumane.. :/