The video shows Bao Li and Qing Bao tumbling, climbing trees and running through the snow that fell across wide swaths of the US.
The twin cubs' departure will leave Japan without any pandas for the first time since 1972.
Hand-reared red panda cub is 'doing well' at Bristol Zoo Project after mother's death.
The public is being asked to pick from a shortlist of four names - all beginning with N.
Two nights of Bristol's own in Queen Square, a new Bristol City mural and a Rolls Royce exhibition.
Their arrival is described as a "significant step" in conserving the endangered species.
The cubs were born a year after mother Xiao, 10, and 10-month-old father Flint were introduced.
Endangered red panda cub twins have been born at the safari park in a milestone moment, keepers say.
Huge crowds gathered in Hong Kong to get a glimpse of Elder Sister and Little Brother
