It is bonkers. But the only way we can even have that video is because the molecules are being frozen in the crystalline lattice.

As far as I know there exists no recording of actual molecules in a liquid (except maybe for something extremely viscous).

The video reminds me this photo: https://petapixel.com/2010/10/27/first-ever-photograph-of-a-...

It shows first ever photo of a human being on a busy street.

But you would not be able to say so, because the street looks completely empty.

The only way we can even see the person is because they stood still for long enough to leave imprint. Other than this one person, everybody else on this busy street moved so fast there is no recognizable imprint of them left. Hence the street looks empty.

Gotcha, I misunderstood - thought you were referring to the scale of the raindrops relative to the tree, not the speed. The photo's a better analogy (and cool).

This much is clear. The post above answers the question of why we can't see atoms that are not part of the lattice.