Keep in mind that
The EF English Proficiency Index has been the subject of criticism in literature. From the point of view of methodology, it suffers from self-selection bias. Instead of testing the level of English proficiency in the population, it tests the level of English of those who self-select.
(From the Wikipedia article.)
I’ve just watched the clip. Is it a parody of the Rawhide theme song or am I imagining it?