The easy red wager

This is a very sneaky hustle.  Whoever you challenge to play this shot will struggle to pot the red ball.  The way the balls are set up makes it almost impossible – but it looks like it could be done very easily.  It is quite simple once you know the secret of the trick,  I expect you to send me £1 for every fiver you win!
Video 1 – The Performance
Video 2 – The Explanation