The Duke and Duchess of Sussex are to make an official visit to the county for the first time.
Another wrote: "I give up on this world when people are congratulating a person shutting a vehicle door on their own".
Markle was attending the opening of an exhibition at the Royal Academy of Arts in London when she stepped out of the vehicle and closed it.
"In an article about Markle's move to close her own auto doors, People magazine reported", Markle, who identifies herself as a feminist on the Kensington Palace website, has always been a proponent of gender equality.
An insider previously explained: "They wanted to hit the ground running after their marriage to focus on their charitable interests and Meghan is really looking forward to representing Her Majesty on her first major Commonwealth tour".
The Duchess of Sussex and Prince Harry have showed off their sporting skills at a sports awards ceremony. "Seems like a Meghan PR piece to me", one wrote.
The response to the video - which was widely shared in a tweet by The Sun's royal correspondent, Emily Andrews - has been varied.
The Duchess of Cambridge's appearance in ITV documentary Queen of the World had many viewers wondering if she's losing her American accent. "Auto door shutting does not fall under protocol!"
Of course, for most of us, closing a auto door is no big deal.
She then shook hands with one of her hosts before shutting the vehicle door behind her.
Markle attended the opening of an exhibition titled "Oceania" at the Royal Academy of Arts in London on Tuesday, Sept. 25.
Royal commentator Victoria Murphy has retweeted videos of Kate arriving at venues and shutting her vehicle door herself.