A British host's camera pool caught the footage on Tuesday evening, which was later subtitled by Canada's CBC
The leaders of world powers including Canada, Britain, the Netherlands, and France were recently caught on camera mocking US President Donald Trump's lengthy media appearances before the NATO Summit. The clip was filmed at a Buckingham Palace reception.
A British host's camera pool caught the footage on Tuesday evening, which was later subtitled by Canada's CBC. The summit will happen in Watford, outside London.
Macron's meeting with Trump that happened before the summit on Tuesday was proceeded by a media session, whereby leaders publicly discussed NATO strategy and trade.
British Prime Minister Boris Johnson can be heard asking France's President Emmanuel Macron, "Is that why you were late?"
Canada's Prime Minister Justin Trudeau interjects, "He was late because he takes a 40-minute press conference off the top."
In the video, Macron appears to tell an anecdote about the encounter as Britain's Princess Anne and Dutch Prime Minister Mark Rutte look on, but the French leader's back is to the camera and he is inaudible amid the hubbub.
"Oh, yeah, yeah, he announced..." Trudeau declares, adding, "You just watched his team's jaw drop to the floor."
Trump exhibited similar behaviour last year when he trespassed summit protocol and instead used the platform to field questions from global media.
He has condemned "nasty" Macron's criticism of brain dead NATO, branded European countries that have failed to meet military spending targets "delinquent" and criticised moves in Washington to impeach him.
Trump is due to give another news conference alone later today after the 29 NATO leaders hold a full three-hour closed-door summit session. Later, a statement celebrating their unity shall be commissioned.