[stadia42]

See https://www.pnas.org/content/117/41/25237

So IMHO, the dumb one isn't the "pen test" from the Japanese TV, but rather the clickbaity YouTube video that makes fun of it. That said, the Japanese TV is slightly tongue in cheek, it doesn't claim to be a science channel.

[0dayz]

The thing is though that japanese can be as poppy as English and vice versa.

A screaming japanese and a screaming English speaker will most likely spread equally amount of germs.