My brother Tony E-mailed this video to me. For me the center green dot comes on and off while the yellow dots seem to disappear for a moment.
I circled one of the yellow dots with my hand so it was the only one I could see. It did not disappear. Neither did the other yellow dots when I tested them in turn. The illusion is real and not a tampering with the video.
Here it is:
This link explains it better. Do you see the dots? This optical illusion is bending our minds