Countdown was for some period of time the most viewed K-pop video on YouTube, until being surpassed on September 1, 2011 by the music video for "Gee" by Girls' Generation.
Countdown sesaat menjadi salah satu video K-pop yang paling banyak disaksikan masyarakat di YouTube, sampai kemudian dilewati pada 1 September 2011 oleh video musik "Gee" oleh Girls' Generation.