The short clip, which was taken of the Red singer at age 4, showed Swift gabbing on the phone with a gal pal. "Christmas 1993, on a very important phone call with Britany," she captioned the pic.
Wearing festive red pajamas, the curly-haired blonde cutie asks her friend in the video, "What, Britany? What? What is it?"
She then posted another clip of her younger brother Austin Swift playing in the sand and drinking ocean water on a beach in 1994.
The "Everything Has Changed" singer, it turns out, was with the Swift family catching up on good times. "Watching home videos with the family," her younger brother shared via Twitter on Monday.
Swift recently celebrated her birthday in Australia on Dec. 13 with friends like New Zealand pop sensation Lorde. "My 24th birthday was a Melbourne garden party," the country pop singer shared with fans. "Thank you for all the birthday wishes!!"