I would say, something like 99.99% of the time, you should not be allowed to retrieve your hand from the muck after verbally surrendering. But I have seen some very unique situations in poker. So I could see a crazy scenario, where the dealer made a mistake, and the player verbally surrenders and mucks based on that mistake, but the mistake is identified immediately and just as those cards are being drawn into muck, and the cards are still identifiable, so they are allowed to be retrieved.
I think the analysis of the situation in the video is pretty correct, in that the hand of the player who threw his cards in the well, should be considered a fold.
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