What a ripper. No wonder the clip clocked up 82 million views in ten years. (I added a couple more, then downloaded it for good measure.)
Curious where the visuals came from I found out they are a slightly cropped version of a scene in Easy Virtue, a 2008 film based on Noël Coward's 1924 play with the same name. I think the audio track has been dubbed in from somewhere else. The dancers are Jessica Biel and Colin Firth.