Contradictory claims about the origins of stress experienced by an American gamer suing an Australian YouTuber for defamation have been revealed in court.William “Billy” James Mitchell, a former world record holder for the 1981 arcade game Donkey Kong,

Donkey Kong and Pac-Man arcade champion Billy Mitchell claims a Queensland YouTuber defamed him through a video about a critics death, a judge has heard.

A fired up and angry Donkey Kong champ has let loose on the witness box, describing why he is suing a Brisbane YouTuber over a “heinous” video he alleges gave rise to an imputation he hounded a young man to his death.

Concerns about a famous American arcade gamer using his phone inside a courtroom during a defamation trial have been raised by a judge.