If you get the Kukkiwon textbook (hardcover) you get the 2 videotapes. They cover basic motions and all Taegueks and Black Belt poomsae as currently practiced at Kukkiwon. The performer is Grandmaster Lee, Chong Kwan who teaches the physical portion of the Foreigner Instructor Course. If you go to the Kukkiwon's website, you can see these poomsae performed as shown on the videotapes.
The Dartfish dvds mentioned previously were produced by the WTF. There are some differences in how the poomsae are performed there versus as done by the Kukkiwon. The performers in the DVDs are Grandmaster Lee, Kyu Hyun (who previously taught the poomsae portion of the Foreign Instructor Course) and Master Jung, Kuk Hyun (legendary competitor).
The Kukkiwon is not the same thing as the WTF.
Miles