Brazil's Supreme Court released a video showing President Jair Bolsonaro expressing frustration that he failed to change security authorities and vowing to protect his family.
The video is part of an investigation into allegations that the president tried to replace senior members of the federal police.
Bolsonaro denies any wrongdoing.
The growing political crisis comes amid concerns that Brazil may be the next epicenter of the coronavirus pandemic.
On Friday, the country recorded 1,001 new deaths, bringing the total to 21,048, and has the second highest number of cases in the world, with more than 330,000.
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Two health ministers left their posts within a month after publicly disagreeing with how the government handled the crisis.
What does Bolsonaro say in the video?
When approaching his office on filming full of profanity filmed in April, Bolsonaro says: "I tried to officially change our security personnel in Rio de Janeiro, and I couldn't do it. This is over. I won't wait for my family or my friends to get screwed.
"If the law enforcement officer cannot be changed, the chief is changed. If not the chief, then the minister."
The Brazilian public prosecutor is investigating the claims of former Minister of Justice Sergio Moro that Bolsonaro fired the head of the federal police because he wanted someone in the role to provide him with police intelligence reports.
The president's children are under investigation for alleged irregularities. They include Senator Flavio Bolsonaro, who is being investigated for alleged corruption.
Responding to the Supreme Court's decision to release the images, Bolsonaro wrote on Facebook that he referred to members of his own personal security and not to senior police officers. "There is no indication of interference with the federal police," he said.
Brazilians were so desperate to see this video that, when it was launched, the Supreme Court website went down. The cabinet meeting was filmed last month and is full of obscene comments from the president.
The video also revealed attitudes within the broader cabinet, such as the Environment Minister suggesting that the coronavirus was a good opportunity – with the press looking the other way – to simplify regulations in the Amazon.
The information is undoubtedly explosive, but it throws Brazil into a political crisis at the worst possible moment, when, instead, it needs to focus on trying to control a virus that is taking over the country.
How did the political crisis come about?
Moro, a former justice minister, resigned last month after Bolsonaro sacked federal police chief Mauricio Valeixo – an ally of Moro – without giving a reason for the decision.
Accusing the president of wanting to install a new federal police chief who would provide him with intelligence reports, he said that providing that information "is not the job of the federal police".
Days later, the main Brazilian public prosecutor requested authorization to investigate the allegations made by Moro.
Moro is a popular figure in Brazil. He is a former judge who oversaw the country's largest anti-corruption investigation, which uncovered billions of dollars in bribes and led to the sentencing of dozens of prominent business leaders and politicians.
The sound of marijuana protests sounded in Brazilian cities after his resignation was announced.