"Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state."
Water can do this but not in standard atmospheric pressure (14.7 psi)
611.66 pascals = 0.08 psi
That ice/snow ball would have to be in a vacuum to evaporate like the video. The real question is can you see water dripping from the ball? Maybe it's wicking off into his hand, I don't know.
What the Triple Point of Water has to do with anything here, I have no idea. Heat is being added to the ice. The ice melts. We can see the water in the liquid state in the video. It evaporates before dripping to the ground (nothing to do with the Triple State) due to various factors. Either that, or there is video trickery, which I highly doubt.
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