How are all the intermediate images between the "lensed" and "unlensed" endpoints of this video generated?
For me, it looks indeed very much like an interpolation, both from what I see and how the caption is formulated. Also: If it would be scientific simulation results, I would have expected whatever the value of the variable displayed on each frame - much like most journals would not accept a 2D plot without axis-labels and units.
Another hint: Martin Kornmesser is a graphic designer for public outreach not a scientist. I guess we would only know if we asked him - but I did not figure out his email yet.