This clip is from the 1957 British comedy film A King in New York, directed by and starring Charlie Chaplin in his last leading role, presents a satirical view of certain aspects if United States politics and society. The film was produced in Europe after Chaplin's exile from the US in 1952, It did not open in the United States until 1967,
The young boys name is Michael Chaplin, son of Charlie Chaplin.
Earlier post on Chaplin here,
Charlie Chaplin - Citizen of the World