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I'm new to this field of science. I'm curious about how quantum computing can win 97% of times in a coin flipping experiment?

Refer this link: Ted Talk by Shohini Ghose

To give an idea about how this coin experiment works:

Quantum Computer plays a move but it is not revealed to the Opponent[Human]. Opponent[Human] plays a move and it is also not revealed to the Quantum Computer. Finally Quantum Computer plays a move. Results are shown. If its heads , then Quantum Computer wins. Else, Opponent[Human] wins.

Here, playing a move refers to "Flipping the coin" . The video talks of superposition and how it can recover heads every time in the final move. This made me think about 2 possibilities:

Quantum computer is tracking something low level in hardware. So, it knows every time, what did the opponent played. Superposition and the third state is just a way, to not consider Opponent's Move (i.e. Ignoring Opponent's move). So, it is actually all the moves of Quantum Computer. So, it knows how to win. If this is the case, then actually there is no randomness or uncertainty added in the game by Opponent.

Just same as how the magician does the coin flipping trick. He practices and controls the flipping power of his thumb, so he knows every time he flips the coin, whether its going to be heads or tails.