READ MORE: • Are these Prince George's cutest photos yet?
Royal-watchers were quick to voice their confusion at the deeply creepy clip:
During their eight-day Canadian tour, the royal couple visited Vancouver's most impoverished neighbourhood, participated in aboriginal ceremonies in Haida Gwaii, British Columbia, and met residents of the small community of Carcross, Yukon.
Prince George, three, and Princess Charlotte, 16 months, made two public appearances during the tour.
William spoke about the milestone eight-day visit - their first official overseas trip as a family of four - saying they felt "very lucky" to have introduced Prince George and Princess Charlotte to the Commonwealth country which will play a big part in their lives.