Charlie says he can’t remember the moment, filmed when he was “about one” and sitting on Harry’s lap.
He says the clip’s success has made life “easier” and helped him get to university where he now studies law.
His dad Howard Davies-Carr previously told Newsbeat the family had made an estimated £1,000,000 off the video over the years.
The video was sold as a non-fungible token, or NFT, for £500,000 in 2021.
But Mr Davies-Carr said he wanted to keep the boys “very grounded” in how they live their lives.
Charlie shares that view and says he doesn’t play the “don’t you know who I am?” card.
“It’s not like I use it as an icebreaker or anything,” he says.
“I was never going to use this as a fun fact.”
Charlie says he doesn’t want to be seen as a show-off, so when asked about himself volunteers “something else a bit more boring”.
“But my friends like to tell people [sometimes], so it’s hard keeping it locked down,” says.
“It slips out every now and then.
“And people are like: ‘Oh that’s cool’, for like five minutes. Or they say: ‘I don’t know what that is.'”