A video posted on YouTube claiming Congolese musicians shouldn't enter Australia and play music unless they oppose the government of Joseph Kabila is central to a trial in Melbourne that involves allegations of extortion, threats to kill and lies.

A County Court jury heard on Thursday that four members of a small Melbourne-based expatriate African group opposed to Kabila – president of the Democratic Republic of Congo – made the video titled Congolese Australia Combattants Prohibit Congolese Music.

Pierre Mwamba: Leader of the Australian "Combattants". Credit:Justin McManus

Prosecutor Alex Albert said in his opening to the trial that four "Combattants" posted the YouTube video in 2013 that "expressed opposition to Congolese musicians coming to Australia and playing music, unless that music was anti the Congolese government".

Mr Albert said that in response to that video, Alain Lombo and Alain Takwende posted a video – titled Angry, Angry, Angry, Angry – in which Congolese musicians were "encouraged to come to Australia".