In the YouTube Trailer for the PBS program A Year in Space at
00:56 a small spinning object can be seen, attached to a spacecraft well above the ISS. I think the video is significantly speeded up so the object looks blurred.
Is this an antenna of some kind or something else? What spacecraft is it attached to?
below: GIF from the YouTube Trailer at about
00:56. The motion is clearer in the original video linked below it.