It looks like internal reflections in the camera lens to me, from the bright earth below.
http://www.mirror.co.uk/news/weird-news/bizarre-megaship-captured-international-space-9974030
In comparison, the image at Wikipedia for lens flare shows similar arcs forming from nearby bright objects
"video" starts at 1 min.
Source: https://youtu.be/nKMKIpys5VM?t=
Updated with Wikipedia reference
http://www.mirror.co.uk/news/weird-news/bizarre-megaship-captured-international-space-9974030
Not sure if debunking tabloids is worth while, though. The video shows the artifact moving around and fading in and out as the camera angle changes, so it's not an aurora.External Quote:
A bizarre 'megaship' has allegedly been captured by an International Space Station (ISS) camera before Nasa reportedly dims the feed.
Conspiracy theorists are claiming that the footage could have been altered by the independent space agency to make the objects 'disappear'.
In the clip, a long 'cigar-shaped' UFO is seen hovering above the Earth's horizon with two bright reflective-objects sitting just below.
The video was uploaded to YouTube by Streetcap1

In comparison, the image at Wikipedia for lens flare shows similar arcs forming from nearby bright objects

"video" starts at 1 min.
Source: https://youtu.be/nKMKIpys5VM?t=
Updated with Wikipedia reference
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