This Youtube video is from Turkey 2006. It is not time stamped, but its authenticity is not in doubt. It changes views by switching cameras.
I have extracted some still images from the video, using Ulead VideoStudio 8.
These images show the frame location within the video. The close up frames are not shown here, but the video shows consistent concentricity. The first and last images shows a tinge of pink just prior to Totality starting and ending. As expected, the concentricity or uniform shape of the corona never changes. When consideration is given to the normal way a Total Solar Eclipse is explained or drawn, then it is apparent that the shape of the corona should change as the Umbra moves across our viewing area.