"Cosplay Complex: Extra Identification" is an extra that shows you what anime each cosplay costume came from. The animation is very simple, it's done with a Picture Drama approach, they show text on the screen for what anime and character the cosplay is from, as they have the Ending credits theme loop in the background. This episode is nothing more than to quench your curiosity. The shows they cosplayed in chronological order of the video: You're Under Arrest Saint Tail Rurouni Kenshin Dead or Alive (Twice)Slayers (Twice)
Wedding Peach
Hand Maid May (Twice)
Omishi Magical Theater Risky Safety
Ushio and Tora
Kiki's Delivery Service
Magical User's Club
King of Fighters
Z.O.E.
Street Fighter
Sorcerer Hunters
Zeta Gundam
Magical Nyan Nyan
Steel Angel Kurumi
Star Trek: Next Generation
Keroro Gunso
Nurse Angel Ririka SOS
Black Jack
Galaxy Express 999
Card Captor Sakura
Revolutionary Girl Utena
Infinite Rivius
Tiny Snow Fairy Sugar
Cutey Honey
Kokoro Library
Final Fantasy X
Nadia
Full Metal Panic!
Nadesco - TV and Movie
Sorcerer Hunters OVA
Akazukin Chacha
Sailor Moon (Twice)

If you Google "Cosplay Complex Identification 101" you can see the video on YouTube.