A moment later the Prince and Princess of Wales enter the premises and congratulate the monarch.
Prince Edward can be seen kissing his brother on the cheek, followed by Princess Kate who did the same before curtsying to the monarch.
Over the weekend, the broadcaster released more videos of the upcoming documentary.
In one of them, Prince George can be seen wearing his red uniform and fixing his gloves as his grandfather and Queen Camilla get in the Diamond Jubilee State Coach to travel from Buckingham Palace to Westminster Abbey.
Earlier in the clip, the monarch can be seen lifting the arm in his robe and saying: “I can fly” before gesturing to his four pages, including George, “Shall we get ourselves organised round there?”
The Queen can also be seen wearing her white and gold embroidered Bruce Oldfield gown and robes.
Her sister, Annabel Elliot, who was a “Queen’s Companion” at the event, looks tearful as she watches her sister head to Westminster Abbey to be crowned Queen.
BBC’s 90-minute documentary Charles III: The Coronation Year will be screened on December 26 at 6.50pm on BBC One and iPlayer.
