Some people know what nicovideo is but still might want a link.
http://www.nicovideo.jp/watch/sm2898038 GyaO version, Ura version or whatever you might call it. Seems to be called 「ジルの冒険」, while the title of the normal ep is ｢ドルアーガの巨塔｣
At first I thought maybe this other version might air as ep2 for everyone else, but ep2 title is different. How could they produce but not air this ura version?. Very mysterious.