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.

An American gamer who held the world record score for arcade game Donkey Kong has appeared in a Brisbane court for the start of a defamation trial against an Australian YouTuber.

An American arcade gamer known for high scores in Donkey Kong claims a Queensland YouTuber damaged his reputation by linking him to a critic's suicide, a judge has

Yesterday Mitchell gave evidence that he was physically sick when viewing Jobst's video, which he said implied he "hounded a young man to commit suicide" by suing Ben Smith, another YouTuber.

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.

Donkey Kong arcade champion Billy Mitchell vomited after he watched a YouTuber's video linking him to a young man's death, a judge has heard.