It was a nice idea in theory: Kensington Palace releasing a social media video to mark the end of the Duke and Duchess of Cambridge's successful eight-day tour of Canada.

The resulting video, though, has been likened to a horror movie.

"We have created such happy memories for our children during this visit," tweeted the official Kensington Palace account - but the accompanying video seems anything but happy.

Dimly-lit, shot in slow-motion and with an ominous, unsettling soundtrack, the clip seems more like an In Memoriam video than a celebration of a family holiday. Take a look:

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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.