What's in the vials? Pfizer Cominarty under the microscope.

I investigate one of Dr David Nixon's most remarkable videos.

UPDATE: It looks like my argument about the arm being elastically connected to the medium may be flawed. It seems that the video generally shows movement on every other frame. I am wondering if perhaps the microscope recorded at say 12 or 15 frames per second. The video file on the other hand (mp4) is at 25 frames per second, in which case I suppose that every other frame could be basically a filler.