Did members of the Queen's Guard in the United Kingdom retaliate against tourists who taunted and harassed them until they finally lashed out? No, that's not true: The video compilation was put together for social media channels by actors who stage public pranks and social experiments.
The claim appears in a post and video on Facebook (archived here) published by Trollstation on May 1, 2023. The headline and description for the post:
Queens Guard Gets Angrey 😱
This is what the post looked like on Facebook at the time of writing:
(Source: Facebook screenshot taken on Wed May 3 15:09:38 2023 UTC)
A longer version of the clip (archived here) from June 18, 2015, appears on Trollstation's YouTube channel. You can watch the full video, titled "Make way for The Queens Guard Social Experiment," below:
At the end of the version on Facebook, a bystander becomes visibly upset at what she thinks has happened. Someone on the crew filming the scene is heard telling her, "We're making a movie -- he's an actor, we're making a movie for YouTube."
The "About" page of the group's YouTube channel makes its intentions clear. It says:
Trollstation is a Youtube channel specialising in hilarious and often surreal pranks performed in public. Our content can be intentionally provocative & controversial especially when we are raising awareness for key social issues.
The group's Facebook page says something similar:
Trollstation a Hidden Camera Prank Show with the aim to laugh with the Public.
Following the death of Queen Elizabeth II on September 8, 2022, and the ascension of her son King Charles III to the throne, the Queen's Guard became known as the King's Guard. It's their job to stand on duty outside Buckingham Palace, as well as the king's other official residences.