That would be exosomes (known about since 1983, I believe) - created naturally in a distressed or damaged cell to try to clean and repair any damage. Yes, same appearance and behavior as the claimed spike protein that they hijacked, renamed and weaponized.
Might have some luck finding the exact video you are looking for on kikechute and searching for "exosome".
It is discussed in a lot of the videos I have, but many of them are quite long and that topic is only part of the many aspects of the hoax discussed in them.
(post is archived)