Yes indeed. The images I posted were video screen captures re-shared by a Weibo user. According to the red annotations in the images, the target was a moving boat. I took his word for it because 1) both the Weibo poster and the originator of the images are not known to be untrustworthy, and 2) I assumed the originator had watched the complete video – which I do not have access to in order to independently verify – and understood what he was looking at.
I will independently verify with my own eyes once I find the complete, high quality video. It might a moving target boat, but the quality of the animated GIF is too low to call it definitively.
Did you ever find out anything about the video or the nature of this test?