Board Thread:Misc./@comment-28958062-20160909173715/@comment-26095689-20160910093331

Just as the description of that video says "Special corner from Attack on Titan: Junior High (Spin-off series from Attack on Titan or Shingeki no Kyojin) where the voice actors will do some challeneges as their characters."

http://www.animenewsnetwork.com/interest/2015-09-21/attack-on-titan-junior-high-promotes-special-voice-actor-corner/.93218