I would say, from what I've heard from my Korean friends and students, that the Arirang video does not actually represent the common Korean opinion on legs.
I've heard my students murmer "젓가락, 젓가락" (chopsticks, chopsticks) whilst pointing at another girl with very skinny legs, and it wasn't in an nice way. My Korean friends have also told me that they would like curves, or they think Western women are sexy because they tend to be curvier (although this may be the typical false flattery they say to foreigners). One of my friend's favorite celebrities is Beyonce, and she's also quite popular with my students.
I'm still upset by the message the Arirang report gives, but I'll try to rest in the fact that the regular people of Korea don't all feel that way, and the majority of them don't watch Arirang anyway
