I really don't like chopping the pot unless there is
absolutely no way I can determine what any player's holding was. If only one hand was turned over or the contents of only one hand can be verified, I might award the pot to that player. The other player should have protected his hand. If both hands were tabled and there is agreement on what those hands were, but no one was certain who the winner was because part of the board was scooped up too quickly for example, then I would consider giving the cards back to the players, putting out as many cards on the board that can be agreed upon (if any), reshuffling the deck, and completing the deal of the board with random cards (in the same way as what might be done if the dealer dropped the stub and irretrievably mixed it in with the muck before a hand is completed).
That being said, I can't picture how this situation can happen, especially if you have cameras. Aren't the players protecting their hands? Aren't the players flipping over their cards at showdown? Didn't
anyone at the table see those hands? How can the dealer muck the hands so quickly so that none of the flipped hands can be seen by any other players at the table or the cameras? Did the dealer just snatch the cards right out of both player's hands while they were holding them and about to turn them over?? Who is this crazy dealer???