for who maybe interested in
That 'some case' is a Silverstone Raven RV-03.
This test is not very helpful, IMHO. The reasons are:-
a. Most people do not remove the side panel. So, this does not reflect the case in actual practice
b. When the side panel is removed, the original airflow designed is destroyed. So, the result is not very useful
c. In the test, CO2 (dry ice) is blown from the side. If the CO2 is blown from underneath the case via the bottom intake fans, then it could be more realistic
d. As the side panel is not totally made of acrylic, perhaps the best alternative is to remove the side panel and then seal up again with a transparent plastic sheet. Then, a see-through effect is achieved while the original airflow designed is still maintained.