It’s Mercury. The MESSENGER spacecraft captured images used to make this video during a flyover of the planet’s north pole on 8 June, 2014. The images were taken once per second while the spacecraft was at altitudes ranging from 115 to 165 km, traveling at a speed of 3.7 km/s relative to the surface. The frame rate has been sped up by a factor of seven for ease of viewing. The images have resolutions ranging from 21 to 45 m/pixel.[youtube https://www.youtube.com/watch?v=oSOv0-iWWwQ]
Video Credit: NASA / Johns Hopkins University Applied Physics Laboratory / Carnegie Institution of Washington
BTW, MESSENGER was launched ten years ago today.