Is this Yuefu? Why are white flowers different from petals?

Judging from your video, this is a rhododendron.

Rhododendron, also known as bougainvillea and bougainvillea, belongs to evergreen woody vines. Its stems and branches are prickly, while the branches are upright and stretched, which is easy to trim and has strong shape plasticity. Based on this, it is often used in landscape design of garden plants. Rhododendron divaricata is a strong positive plant, which adapts to strong light and warm and humid climate. Usually the outside > flowering 15℃ is suitable for strong light.