Look at this crazy fool! Video taping a customer winning so many jackpots that the machine goes empty. Then he sends the VHS into YouTube for his £200 reward and claims this is done by true skill. This guy is deluded.
1) That machine was being SCAMMED
2) Here follows the correct procedure to follow in this eventuality...
4) Dial 999 and scream POLICE at the operator
5) Capture the offenders image on HD CCTV and send the video tape to all establishments in your company
6) Instruct staff in said establishments to inform the offender(s) of their status in said establishments as follows
9) I'm sorry, I need to ask you to leave
6) On this occasion, we are unable to allow you onto the premises

Hopefully Dave will take these constructive criticisms on board and as a result stop these persistent machine scammers.