You sort of can't. No idea about video games but it's a big issue for chess. Really top games (world championship) are played person to person in a sealed env

You sort of can't. No idea about video games but it's a big issue for chess. Really top games (world championship) are played person to person in a sealed environment with moves relayed out of the room after a 15 or 30 minute time delay. Online games of any importance require you to set up TV cameras in your playing room, etc.