"One" was released as the first promotional single for x to provide a classic ballad counterpoint to the more upbeat, experimental lead single, "Sing".
The video premiered on Sheeran's YouTube channel on May 2, 2014 .
It was filmed in a completely empty Wembley Arena in London.
Shot in black-and-white, the video uses long takes and wide shots of the cavernous, empty venue to highlight the song's themes of solitude and closure. Song Meaning and Context