The recording was made on October 7 at the time when two astronauts walked in space for repair work on the ISS. According to The Daily Mail, there worked flight engineers Reid Wisemen from NASA and Alexander Gerst from ESA. The object was recorded by the surveillance cameras of the ISS.
The video shows UFO, which looks like an elongated line, seen hovering for a few seconds behind the back of one of the astronauts.
Immediately there have appeared different assumptions about the origin of the object, starting from the fact that a spacecraft from Earth could get into the shot, or it was just a flare or dust. NASA prefer not to comment on the video.