Ssah-dah!! means (It’s cheap) and this is what Lee Seo Jin is saying in his Kung Fu fighting voice at the beginning..LOL^^
Male voiceover: This is WeMAP’s shopping advantage!
Absolute We! WeMAP!
Caption with Lee Seo Jin and Lee Seung Gi: We congratulate you on your 3rd Anniversary…A congratulatory message from two men
Dimple brothers: Hello, I’m WeMAP model Lee Seo Jin. Hello, I’m Lee Seung Gi.
Lee Seo Jin: With your love, it’s been 3 years for WeMAP
Lee Seung Gi: In order to continue hearing your praises of “it’s really cheap” in the future, WeMAP will work even more diligently. We ask you for lots of love.
Dimple brothers: Shopping’s absolute advantage, WeMAP!
Korean to English translation by Elise Min, Lee Seung Gi Forever